Old thread but I just saw it so. Its been a bit since I saw the Scorpion King but if we are going to go by low points, never actually attacking someone in the open and not beating Memnon (who was less impressive than Achilles) in melee, both of which the OP call for, not to mention getting captured by mooks, aren’t really enough to give Mathyus the win here either.
Mathyus’s highest point for single combat arguably was beating Michael Clark Duncan’s character. Hector’s was beating Ajax, who I would take over Michael Clark Duncan. Hector’s standard melee loadout (sword, spear, and shield) are also more versatile than Mathayus’s range of simple melee weapons shown in the Scorpion King.
Neither actor showed any exceptional skill with their weapons. Eric Bana never seemed to know what to do with his shield (though he did better with the cressant shield in his first two fights than the hoplon style one he uses in his fight with Achilles) and Dwayne Johnson was horrible with a sword.
Still Hector’s more conservative, defensive style in the movie plays well against Mathayus’s head on, let’s never try to flank style. I think he could hold Mathayas off until he gives him an open, which he does quite often in the movie.