Stick with straight Psychic Warrior.
Claws of the vampire + Improved Body Equilibrium (or whatever that power is called). You take part of the damage dealt to you as subdual, and then heal the damae you deal. Since subdual heals an equal amount whenever magical healing is applied, you'll be pretty hard to take down.
After you get the combo (at 8th level) you can start getting Fighter (or Barbarian, or Ranger, or even Paladin) levels in order to increase your BAB at the highest rate possible.
Good feats to look at are Speed of Thought, The one that makes unarmed attacks be touch attacks (although it is expensive), and the one that stops people when you AoO them.