One thing to note about Wilder is that its class ability, Wild Surge, gets steadily worse as you gain more levels -- it's a big boost at level one, but ends up a very minor gain at high levels -- and the lost action really, really hurts at high levels. So, I'd take as few Wilder levels as possible. Level 3 is a good time to quit.
Slayer (SRD version of Illithid Slayer) is a very nice PrC for someone with Survival on his class skill list, since you need Track to qualify. It's full-BAB, 9/10 manifesting, and you end up with a permanent
mind blank while psionically focused (at level 9). Pretty sweet.
Another PrC to consider is the Sactified Mind from Lords of Madness. It's a full-BAB, 5/6 manifesting (over 6 levels), and nets you Spell Resistance at 6th level. Plus lots of "smite aberrations" stuff.
There's probably something in Hyperconscious made just for this combo.
-- N