I'm ready to level to 18 as a pure fighter and there really aren't any feats left to take. I have 3 left. Does Least Dragonmark of Passage stack with striding boots? I am thinking of taking the 3 dragonmark feats of passage. Or 3 more toughness slots. Or diehard mixed in with any of those. Advice? FYI - already have full TWF chain, imp crit, etc.