For some reason I can't seem to find whats so great about DnD (as a level 70 frost tank). On occasion when I have large pulls I'll use it, but more often than not I prefer to Icy Touch > Pestilence > Blood Boil > Howling Blast (by now Killing Machine has proced...if i definitely need the crit I use Deathchill.
Rinse, repeat, if necessary. It gets the job done. Even with AoE happy mages. I hold aggro.
For some reason whenever I use DnD it throws off my whole "rotation" and find myself tripping to get a groove going. Losing three runes at once instead of a few in a progressive order just seems like a waste.
At the moment I don't have improved DnD from unholy nor do I have the DnD glyph...personally I don't like the skill. Am I missing something? Should I reconsider? Or if what I'm doing is currently working is this fine?