third level powers for a psychic warrior

[Tyrrell]

I have a psychic warrior who is closing in on ninth level . I will soon have to choose another third level power for him. I have improved biofeedback. I think that displacement looks good but I don't see anything else that really catches my eye. Are there any good 3rd level powers at the mind's eye?

The character uses a great sword. He often uses animal affinity and expansion (soon polymorph) to get an impressive strength.

I am also deciding between two feat chains my selection of powers may change my mind on which group of feats to take.

1 expertise, improved trip, knockdown

2 combat reflexes, stand still, pressing attack (FFG)

In favor of the first option I have the second level "extending arms" power so when I get polymorph self I can turn into a troll or anis then I can get a 15' reach.

On the other hand the character's AC sucks and my DM wants to allow an "improved trip" follow-up attack after a knockdown regardless of what the sage says.

So what third level power have I overlooked?

(str 13, dex 13, con 14, int 12, Wi 12, chr 11 I have a stat point at eigth level that I will put into int if I go for the first set of feats and dex if I go for the second)

 

[(Psi)SeveredHead]

The Mind's Eye has some cool psychic warrior powers, but other than Vehemence (Vigor, but better) there aren't any 3rd-level powers ... at least, none that I am familiar with.

Displacement is really good, but maybe not at such a low level.