And how are you dealing so easily with that -20 hide penalty for hiding after attacking? There's a feat to knock it down to -10, but feats are precious. Also, by level 10, extra-sensory abilities start to become more common in monsters. Hiding from vision alone may often not be enough. +4 dodge AC and Uncanny Dodge always work, unless you get paralyzed or grappled or otherwise put in a situation where you're SOL anyway...
As a final point, fireball doesn't care if it can't see you, if it knows which way you went.
EDIT: Perhaps I should clarify a little. The main reason I like DW Dodge + Titan Fighting is for tanking, not purely personal safety. It works so well. Enemy sees you, looking all squishy, darting around annoyingly dealing significant damage and targets you....only to realize it can't hit you too well... Thus wasting its actions for the rest of the party to pound it down. Worked well for me, maybe not for others. At least in my games, AC 31 and 20% miss chance (Child of Shadow) at level 9 = practically unhittable.