I note that you say you're going to in the opening paragraph, but the skills list doesn't include any of them. Also for Hells you'd need ESF Search/DT wouldn't you? Though that 18 INT might get you pretty far without it.
Oops, I did indeed take the skills, build updated. Wasn't sure about ESFs... haven't had a chance to try any hells locks yet. I suppose you could drop a couple of Great Dex if they really are essential, at the cost of 1 AB, AC, DC and Reflex save. In my case I've got three months to wait until I can change that at any rate, so I can at least try a few locks in the mean-time and see how well i do.
Been thinking of ditching my rogue plans for this build, I have been trying it out with an old reincarnated toon (pre immo pixie) As I'm planning on using an Atomie theres a bit of a problem with the 1st level feats (so will lose one LSA I think), but.. can't have it all I guess
I'd probably drop Parry, I think the loss of some critical reduction would hurt less than losing shield immunities and AC with it, should you get slagged. I plan to post an open subrace version of this build some time soon as i've enjoyed it so much - this may well use halfling to try and get max DC and that's what I planned to drop if it does.. not sure yet, will have to try a few different options in the test chamber.
edit: Updated screenshot with epic buffs and BUR robes/ring.