I'm playing a Frost DK in 2s and 3s, and generally have problems with whatever setups we run into which includes a Disc.
Playing with a Rdrood in 2s and DH/DK/Hpala in 3s, both being around 1500-2000 rating so far.
I/we simply cant get anything down.
Whenever we try do sit on the dps, the disc seems to be apple to keep everything alive just fine.
And when i try to switch to the priest in 2s i cant seem to get him below 75% Hp, i never feel like i get the chance to silence and stun him and set up the kill.
The problem seems worse in 2s.