Ok, i'm going to boost 2 accounts with my DK, i'm thinking Druid and Shammy. Both Healing classes (so thety can help heal my DK in tougher instances) but they both are good solo/dual boxing classes.

How would i set the action bars up?

Would the druid Tank in bear form and the Shammy totem and heal?

Otherwise, i was thinking between these 4 classes. Shammy/Warrior/Priest/Druid

Maybe they would be better?