You do realize Blood Boil is far superior to Icy Touch for anything more than 2-3 targets right? If you're using Death Runes as Blood to cast IT around a group of mobs, you're doing it wrong.
Really not sure where I said I wasn't Blood Boiling. Assuming the OP is having trouble keeping aggro, this usually means a mob or two is running away from him to an unsuspecting ranged or melee DPS. If you have a couple of mobs running away, Icy Touch is going to give the mob back better than Blood Boil (depending on the aggro lead). I never said to use Icy Touch over Blood Boil for general AE threat.
If mobs are running away, Icy Touch is more likely to bring them back in than Blood Boil. At no stage did I say "swap Blood Boil for Icy Touch". Instead of putting words in my mouth and gemming for armor pen too soon, you should learn to read.
No, that's right. I didn't. Unlike you, I made the assumption that the OP knows at least something about the class he plays. If a mob is running away, Icy Touch > Blood Boil.
This is pretty funny......