The best thing to do is to just get it to any form at level 80 so you can start raising its BSt.(this stat goes up as you complete missions with you PM); cheap, high star clothes like kouze shoes can raise the armor stat pretty fast. I believe one of the better healers is the the GH450 line, so you can either get your bot to 30+ TECH, or use a EX Device GH45x at BSt. 30.