Talia and Old Daka are the only healers on the Dark Side. Old Daka doesn't lose life blood when she heals. I would focus on gathering her shards and ranking up her healing ability with upgrade discs. That's what I'm doing. Ideally, I'd like to have her and Talia maxed out first so I have optimal healing abilities. On the light side, I'm doing much the same thing. The bonus is, when you enter galactic war or other arenas, you can take any 5 characters. With 5 healers, I'm not sure how you could lose! Keep at it, great strategy!