The powergamer would obviously not be a melee class, he'd be a caster.
Therefore depending on how many points available to him; 16ning his primary casting stat, and putting some points in dex/con, and a bit in wis so he still has decent saves
Or 18ning his primary casting stat and else doing the same routine.
If he was actually a melee class he would obviously not neglect Dex, which determines AC and the reflex save (Good for avoiding a bit of damage) and Wis (Which boost his Will save, which he needs, badly)
A powergamer playing a fighter (LE GOD?! Is that actually possible?!) would probably know the value of a dude capable of slowing down the advancing enemies with spells.
That was semi irrelevant, but i felt like pointing it out.
I admit i am going by D&D rules here.