Looks like most of the TWF builds take Constitution to the 10-to-14 range while leaving the ultra-handy Wisdom languishing down at 8. And then slap Toughness onto the character into the bargain. This seems like backwards thinking to me--surely being able to throw even a Cure Light Wounds or two would rapidly far exceed the HP benefit from a few points of Con. Is there a feat dual-wield paladins take that requires it? I can't think of a way to check that wouldn't involve manually checking each feat in some of the guide builds.