4 Elemental Shaman and 1 Unholy DK is Evil.
If the Shammies are static I just float the DK on their perimeter casting Chains of Ice of Touch of Frost/Pestilence then CL.
For more Defense D&D with Magma or Nova over the Shams.
Its especially useful for Rogues.
I tried various combos,but settled with 4x1 it was the easiest and most effective,4 melee and 1 healer/caster class was too much like hard work.
GL