I run fire / mental as my main and can send you my build if you want.
I would personally build for more recharge and HP instead of soft capping defense.
I went Force of Will / Leadership / Leaping (for CJ) / Speed / Force Mastery. With enough recharge you can basically rotate between Unleash Potential / Force of Nature.
For destiny I went with both Ageless and Clarion and switch out depending on the enemy type.
Feel free to PM