@blackestnight93: Tombstone has gone in close more often than not so I don't think he will use the gun all too often but I put it in there just in case. Aside from that he is labeled a 6 tonner with Spider-Man and Daredevil commenting on his quickness, not saying he is fast to leap and flip around with them but he is faster than what he appears to be. His biggest asset is his durability with Spider-Man using a webbed hand and full punch to KO him, tanking room sized explosions, helicopter blades hit him and he went flying so he has a solid amount of piercing and blunt resistance to him. Presea was one of the slower ones in TOS but she is considered able to deflect laser fire and the axe is big and can act as a shield and the environment has big areas of cover. I don't see her out pacing bullets or cutting them in half but she is mobile, had earthly protection ability for a 360 barrier and can do flips with the axe pretty quickly. On top of that she has her mana abilities like beast and devastation and eternal damnation attacks to form an AoE effect or form a quick shockwave to throw people off.
Namor wins. Namor just has better overall stats and feats. However, I think Ares has some feats that have him doing better against some opponents than Namor has against the same. Namor I feel just has a higher consistency against the same ones and better ones against better opponents.
I don't think they have ever had a definitive fight, at least not to my knowledge, but they did have an encounter in Avengers/Invaders, and Namor managed to catch Ares' axe when he threw it at him from behind and Namor threw said axe into Iron Man.