Very nice build. Seen it for myself how powerful and survivable it is and I'm planning on making something similar with Brownie. I'm glad you ditched the self-concealment 5 route, never been a fan of it myself.
Self Concealment: At 30 levels of rogue, for each rank of Self Concealment a character possesses, he may add 4% of his Hide skill to his effective concealment. The bonus is capped at 1% of Hide skill per level of rogue above 18 (hence, the cap begins at 12% at 30 levels of rogue and reaches its maximum of 20% at 38 levels of rogue).
70% permanent conceal is nothing to be sneezed at IMO.
I have never been a big fan of the SC route on rogues. Funky has explained how SC works to me more times then I care to remember. A natural 20 hits me no matter if I have 10% conc, 70% conc 15ac or 150 ac. With my ac that high a monster will need a 20 to hit me anyway. It just seemed redundant to have SC when I will get auto hit on a 20. Calad
edited for spelling since seam and seem bug people
Oh, I'd always thought conceal could save you from those 20s. That explains a lot. Doesn't that kinda screw staffmasters? Bit off topic, whoops.
I could be completely wrong about the whole thing Bort, and if I am I'm sure one of our DM's will quickly let us all know. Besides if you really need conc, just ask your friendly bard or wiz/sorc for a displacement. You wont be doing any hells runs without at least 1 of them in a party.
Concealment is rolled before AC. So if you have 50% concealment, half of hits will miss before the d20 is rolled. So, 50% concealment does effectively block half of all 20s, by ensuring half of them are never rolled.
However, epic dodge is done last - so that is the real key to protecting from 20s.