I think the problem we have here is the wonky wording on Talashtora feat, namely the last sentence:
Your levels in the psionic class you selected
for Monastic Training stack with your monk levels to
determine your AC bonus, flurry of blows attacks, and
unarmed damage from
the monk class.
Note: Relevant word bolded for relevance.
Now if it had said something sensible, like "your monk levels" or the "AC bonus, flurry of blows attacks, and unarmed damaged you gained from the monk class", then there would be no problem (which I'm pretty sure is the intent of the feat, and how I'd rule it if I were running).
But it doesn't, and thus it is left open to the possible interpretation of the feat granting and advancing those class features even if you never had them to begin with.
This is the only link to the original King of smack that I have that still works.
http://community.wizards.com/go/thread/view/75882/19866038/The_king_of_smack.
Aside from what is in there... other powers I'd say you shouldn't miss:
Ubiquitous Vision (XPH) - For the price of a -4 on saves vs gaze attacks, you now cannot be flanked.
Anticipatory Strike (CPsi) - You have to spend a feat on Expanded Knowledge for this, but if you do you can spend 9 power points to take your turn for the round (or the next round) as an immediate action. All pisonic characters should have this, IMO.
Reach - Increase your reach by 5 feet. Stacks nicely with Expansion and other things, and just as much of a no-brainer if it's allowed.
Not exactly a feat but a feature that might be worth considering is Aligned Strike from Complete Champion
It requires a loose interpretation of the rules, since you are required to give up a fighter bonus feat, which technically you have as a psychic warrior, and gain the ability to align your weapon to match either component of your alignment, essentially as an at will, supernatural ability that you can use as a free action.