Been thinking myself about this for a while now. It has more to do with no willing to level another DK (the priest is on that account) and willing to heal with my main priest. So my only option is to spec a shaman enhance. Giving me the opportunity to run 4x dk + ehance or priest 3 dk enhance.

I'm not too sure how macroable it is, but enhance can put out a lot of pressure.

It brings unleashed rage to the team and a fear breaker.
Putting the wolves on any caster might cut you some slack.
Grounding totem offers another caster protection.
Hex is always good to have.
Purge & 5 second ranged interrupt.
Ranged root.

There is a lot of added protection vs casters imo.

The only thing that makes me doubt atm is that my shaman is orc, and the others are blood elves. Never liked the different sizes of toons while boxing.