Sorry about being late ... holidays and all
Unless someone tells me otherwise, I’m going to assume that’s the case. In 1E those would be:
B. Mind Thrust
E. Psychic Crush
F. Mind Blank
H. Mental Barrier
Mind Blank, I do believe, is now called Empty Mind.
Hmm... there's a big problem here, and that is the nature of psionic combat.
In 3.0, psionic combat (except Mind Blast) only seriously works against psionic opponents. As a result, the monster will have an oddly different CR if he's facing psionic opponents or not.
The second is that 3.0 psionic combat isn't worth the time to use. While he's using a standard action to whittle a psion's stats, he could just ... walk up to him and rip him to pieces, or use a spell-like ability.
(The effect is devastating on a low-level psion, but only in the long-term. It's more of a curse than an attack form.)
Now, by giving it defense modes and declaring it a psionic creature, it is now vulnerable to psionic combat
in theory. In practice no one is going to use attack modes on it.
I don't know much about 1e psionic combat, but I think it only worked on psionic opponents too. It was deadlier... probably too deadly. And if it only worked on psionic creatures, then Mind Blast should not be included (since it's basically a power, rather than an attack mode - depsite being treated as an attack mode in the Illithiad).
My suggestion is to either give it a minor anti-psionic ability (such as a power that disrupts the ability to use psionics like a 3.5 silver sword for several rounds) or drop the psionics from the monster entirely.