If you're just questing, I would change the roles around a bit. I just boxed a prot pally, balanced druid and fire mage from 60-70. What I did was bind Starfire, Hammer of Justice, and Fireball to the same key and nuked. If the mob didn't die before it got into my HoJ range, it got stunned. If HoJ is on cd, I taunted with the pally. My casters never got hit. I kept the pally as prot for when I actually needed a tank for group quests. Maybe give that setup some thought, your shaman is still dps.