The mantle setup reminds me of something.
What are you going to use Psicrystal Affinity (
not Solicit Psicrystal) for ? I assume you're going for Psionic Meditation at level 6 and that's why you took Track early rather than late.
"Covered in poison" is not covered by the rules, no. Just put some on your fists and you'll get one poisonous slam attack with each... probably.
Don't forget Tap Mantle as a possible feat. Guardian for Damp Power, Dispel Psionics and Wall of Ectoplasm can be worth it, as well as a few others... but I don't really know where you want to go with this character. Gishy, probably.
Prescience, Offensive is hardly my favorite power but it could be a better choice than Dimension Slide given that you already have 2 mobility powers.