Attn:Sephice

[Toned]

Who said anything about leaving healers open and dps un cc'd?
Mass Chains
Strang Healer 2
Hungering Cold
Mass Grip / Mass strang
ETC... Lots of things to do to protect your healer while shutting down theirs to train some one.

Also the 1v1v1v1 that you post I'm assuming you're not counting DK's defensive cooldowns? We can go Stun Immune, Fear/Poly/Sheep Immune, Knock Back Immune, and Absorb spells with AMS. Then Trinket anything else.
The way you beat our comp is out last us / survive the first 60-90 seconds. Frost DKs are a 1minute class even in 2s and 3s as a single toon. Our whole offense relies around 1min strang, 1min HC, 45sec AMS + Runic Empowerment / Lich / IBF.