Stheno's and Euryale's physical abilities improve a lot because they are very fragile and have no physical abilities. so their classes grant them a lot power that they wouldn't have otherwise. this doesn't have anything to do with their divinity which is based entirely on being idols. their level of godhood is directly proportional to their followers and those who sing their praises. these days their divinity is much weaker than it used to be.
Also i know how i could fuel Ares in a grail war, as soon as he is summoned i would need to find a way to instigate a human war and let him feed on the war itself... i mean it is the holy grail we are talking about surely other mages have done worse things for it, right?
eidt: anyone enlightened enough about forum spaghetti code to know what happened with that Red Fel quote? even if i try to fix it the forum automatically splits it into two quotes.