Respect Darth Chratis:

Power

Darth Chratis can kill his apprentice, Eldon Ax, as easily as swatting a fly:

Her life had been too short - just seventeen years! - but she wouldn't raise a hand to defend herself, if her master chose to end it now. There would be no point. He could strike her down as easily as swatting a fly.

Source: Fatal Alliance

Shigar Konshi recognizes that he can only contend with Darth Chratis physically - and that if the fight descended into one including Force powers, that he would lose:

He struck back only with his blade, knowing that he would lose if the fight descended into a free-for-all of telekinesis and other Force powers. That was inevitable.

Source: Fatal Alliance

Combat Skill

Chratis sweeps his way through hex droids with minimal effort, and taunts Shigar Konshi, claiming that his combat skills were poorly handed down to him, indicating that Chratis could observe Shigar's skills and flaws in his technique even in the midst of battle.

The Sith Lord swept through hexes with little apparent effort, leaving them for Shigar to finish off. The Sith Lord's lightsaber had an unusually long reach, emerging as it did from a collapsible staff of some kind. Darth Chratis also had another weapon that Shigar did not. His lightning was much more powerful than Eldon Ax's efforts and had an effect similar to the electrified nets Stryver had fired at the hexes on Hutta, sending them into paroxysms that left them vulnerable to conventional attack.

"The Grand Master has taught you poorly, " Darth Chratis said, observing Shigar's efforts to subdue the last of the hexes. "She allows philosophy of mind to interfere with outcomes in combat. That is how the Sith will triumph over you and your kind, in the end. You will hold yourselves back from achieving your true potential. "

Source: Fatal Alliance

Darth Chratis duels roughly evenly with Shigar Konshi, but does manage to press an early edge and Shigar recognizes that he cannot defeat Chratis by virtue of raw skill - only if the latter made a mistake. Chratis ultimately wins via Force Lightning:

His lightsaber moved as though of its own accord, sweeping forward into Darth Chratis's reach with an almost delighted hum. Their blades clashed together once, twice, three times, and the Sith edged back a step.

"Yes, excellent - "

Shigar didn't let him talk, pressing him with another combination of moves, staying light on his feet for the inevitable responses, feeling with every instinct, every breath, what must be done. They danced together along the lip of the crater, in full view of the surviving members of the attack force. No signals went up, no word to disband the alliance; comms were down, so the joint assault of Sebaddon went on.

Darth Chratis rallied with a series of bold, vicious strikes that cost Shigar the ground he had made, and more. He struck back only with his blade, knowing that he would lose if the duel descended into a free-for-all of telekinesis and other Force powers. That was inevitable. His only hope lay in Darth Chratis making an early mistake, giving Shigar an edge. Even then, it was going to be hard. Sith didn't die easily.

Neither do Jedi, he told himself, even as sweat trickled into his eyes and he tossed his helmet away, to better the fight unhindered.

"You are growing weary," said the Sith Lord. "Your resolve is weakening. I can feel it. You know that you will never beat me this way. Your only hope is to reach into your heart for the anger that we both know is there."

"Anger will never rule me."

"Think of the Grand Master. Think of your homeworld and all who died there. Tell yourself that I killed them, and seek that strength that knowledge brings."

"You had nothing to do with Kiffu."

"Didn't I?"

Shigar fought on, matching Darth Chratis blow for blow. The red blade took three centimeters off his braid. He scored a line across the Sith's right shoulder.

"You cannot win without the dark side."

Shigar silenced his thoughts and feelings. He was only the blade. He was only the Force.

"You cannot win without the dark side."

Darth Chratis sent a wave of lightning across the gap between them. Shigar tried to catch it with his lightsaber. The shock coursed up the blade, into the hilt, and from there into his right arm. It burned like acid, much more powerful and insidious than the blast Eldon ax had hit him with on Hutta. It didn't just hurt. It ate at his resolve, telling him to fight fire with fire, to use the Sith Lord's own weapons against him in defiance of his own Master's advice. If he didn't, he would surely die.

Source: Fatal Alliance

Endurance

Darth Chratis spends an hour every day meditating in a sarcophagus without light or air, forcing him to rely on his own power to survive:

In order to focus most effectively, he occupied at least one hour a day in a coffin-like shell that allowed no light or air, forcing him to rely solely on his own energies to survive.

Source: Fatal Alliance

Speed

Chratis telekinetically slams Eldon Ax into a wall before she could react, despite the fact that she had been expecting such to happen:

The blow came so fast she couldn't avoid it, even though she'd expected it from the moment she boarded the Paramount. She felt herself swept up and thrust with crushing force into the nearest bulkhead, and held there, unable to move.

Source: Fatal Alliance

Telekinesis

Chratis casually Chokes his apprentice Eldon Ax:

The cold, strong grip of the Force was back at her throat, pulling her irresistibly upright until she was standing on tiptoes.

Source: Fatal Alliance

Whilst meditating in his sarcophagus (which thus prevents gesturing), Chratis slams Eldon Ax into a wall and pins her there:

The blow came so fast she couldn't avoid it, even though she'd expected it from the moment she boarded the Paramount. She felt herself swept up and thrust with crushing force into the nearest bulkhead, and held there, unable to move.

Source: Fatal Alliance

Together with Shigar Konshi, Chratis twists blast doors apart as if they were made of tinfoil:

Operating in tandem, they were able to twist the blast doors aside as though they were made of tinfoil.

Source: Fatal Alliance

Telepathy & Empathy

Darth Chratis reveals that he had placed a memory block on his apprentice Eldon Ax's mind, preventing her from knowing her past. He displays the ability to remove the block as well as apply it:

"The block is strong," he said, and it was as though the words came from inside her head. "It's standing between you and the truth. I release it. I release you, Ax. You are free to know the truth about your past."

Source: Fatal Alliance

Chratis uses the Force to make it appear as if he was standing next to Eldon Ax, to the point where she appears to feel him next to her. However, as the lights burst on, Chratis is revealed to be in his sarcophagus for the entirety of the affair, indicating he had influenced Eldon Ax's mind to an extent:

The deadly hiss of her Master's voice slid like a red-hot needle into her right ear. She could feel him next to her, even though the room was in absolute darkness. His presence was like a foul-burning fire in the fabric of space itself.

...

The lights burst on, blindingly bright. She fell to the floor, released, and blinked away bright afterimages. The room was square, black and empty apart from her Master's meditation sarcophagus mounted securely in the center. He was inside it, his withered face hidden safely behind the lid.

He had never been standing beside her at all.

Source: Fatal Alliance

Chratis claims to be able to crush Eldon Ax's mind to dust:

"Allow me to explain, Master."

"If you cannot, I will crush your mind to dust."

Source: Fatal Alliance

Chratis reads Eldon Ax's mind:

"Abase yourself before me," he told her, "and swear to me that the thought I see in your mind is not another reason I should kill you now."

Source: Fatal Alliance

This time by a third-person objective narrator, Chratis is stated to be able to crack Eldon Ax's mind like an egg with a thought:

Darth Chratis held her mind like an egg, ready to crack it with a thought.

Source: Fatal Alliance

Eldon Ax only dares to hold dark thoughts against her master once she reaches a safe distance:

Only when she was sure she had reached a safe distance did she dare think, You can expect no mercy from me, Master, the day our positions are reversed.

Source: Fatal Alliance

Chratis influences Shigar's mind, causing him to shiver and making him want to lash out and strike at something:

Operating in tandem, they were able to twist the blast doors aside as though they were made of tinfoil. Shigar considered their cooperation a small moral victory until he broke off the effort and shivered. Something of Darth Chratis had clung to him during the effort. A coldness, and a foulness. His fists clenched as he stepped over the buckled metal and onto the bridge. He wanted to strike out at something, but there were no hexes around. Just Imperials, who were temporarily reprieved.

Source: Fatal Alliance

Chratis reads Shigar Konshi's mind and then communicates with him telepathically:

He leapt, vowing, I will never be your apprentice, Darth Chratis.

A silken sinister voice came back to him in reply.

Make no rash promises. After all, I may soon be in need of a new one.

Source: Fatal Alliance

Lightning

Shigar notes that Darth Chratis's Lightning is much more powerful than Eldon Ax's as Chratis's Lightning leaves several Hex Droids (who were immune to an enraged Eldon Ax's Force Crush, as well as conventional attacks and even lightsaber strikes) in paroxysms in which state they were left vulnerable to conventional attack:

Darth Chratis also had another weapon that Shigar did not. His lightning was much more powerful than Eldon Ax's efforts and had an effect similar to the electrified nets Stryver had fired at the hexes on Hutta, sending them into paroxysms that left them vulnerable to conventional attack.

Source: Fatal Alliance

Chratis scatters a mass of hex droids with Force Lightning:

Force lightning spread through them in waves, breaking the mass into manageable parts.

Source: Fatal Alliance

Darth Chratis unleashes Force Lightning that hurts Shigar Konshi, triggers a psychological war in his mind, burns his suit, and destroys his lightsaber, turning it into blackened pieces at his feet. Again, Shigar notes that the blast was much more powerful and insidious than the blast Eldon Ax had hit him with on Hutta:

Darth Chratis sent a wave of lightning across the gap between them. Shigar tried to catch it with his lightsaber. The shock coursed up the blade, into the hilt, and from there into his right arm. It burned like acid, much more powerful and insidious than the blast Eldon ax had hit him with on Hutta. It didn't just hurt. It ate at his resolve, telling him to fight fire with fire, to use the Sith Lord's own weapons against him in defiance of his own Master's advice. If he didn't, he would surely die.

...

His lightsaber lay in blackened pieces at his feet. His suit stank of smoke.

Source: Fatal Alliance

Force Shield

Darth Chratis utilizes a Force Shield:

Darth Chratis vanished behind a shimmering Force shield.

Source: Fatal Alliance

Sense and Dun Moch

Chratis taunts Shigar Konshi, claiming he was taught poorly by the Grand Master:

"The Grand Master has taught you poorly, " Darth Chratis said, observing Shigar's efforts to subdue the last of the hexes. "She allows philosophy of mind to interfere with outcomes in combat. That is how the Sith will triumph over you and your kind, in the end. You will hold yourselves back from achieving your true potential. "

Source: Fatal Alliance

Chratis senses that Shigar Konshi is tiring and that his resolve is weakening, and then uses this as a means of Dun Moch to taunt him:

"You are growing weary," said the Sith Lord. "Your resolve is weakening. I can feel it. You know that you will never beat me this way. Your only hope is to reach into your heart for the anger that we both know is there."

"Anger will never rule me."

"Think of the Grand Master. Think of your homeworld and all who died there. Tell yourself that I killed them, and seek that strength that knowledge brings."

"You had nothing to do with Kiffu."

"Didn't I?"

Shigar fought on, matching Darth Chratis blow for blow. The red blade took three centimeters off his braid. He scored a line across the Sith's right shoulder.

"You cannot win without the dark side."

Shigar silenced his thoughts and feelings. He was only the blade. He was only the Force.

"You cannot win without the dark side."

Source: Fatal Alliance