My advices:

1. Ditch the druid. I've tried playing with druids several times, it has never worked for me.
2. Get a paladin healer if your gear is bad. If you have good gear, you might consider other healers.
3. Gem your main char defensively with stamina and resilience, but go for mostly the same enchants as your slaves. Don't make your main's spell damage too low.