Originally Posted by
Raugnaut
A) Unholy Burst has quite a bit of ramp-up time (Generally at least 7-8 seconds from a fresh start). Granted, it last's significantly longer then Frost's burst, and can happen more often. However, it can also be easily stopped (CC on the pet)
Frost Burst requires the push of 1 button, and you are suddenly bursting. It also happens every minute.
B) Frost has Howling Blast, as well as the fact that its favorable, rune-wise, to use it. Unholy, for ranged attacks, have Death Coil (Requires a bit of RP to use), DnD (Has 33% uptime, and thus can't be spammed. Frost has this as well, the only difference is that Unholy has more rune-favor on it), and Icy Touch (Very non-rune favorable).
C) Frost has 2 permanent Death Runes, and can get up to 6 Death Runes, if i remember correctly. This means that they can put out quite a bit of Necrotic Strikes on the target. Unholy has NO permanent Death Runes, and can only have up to 4 Death Runes. Thus, Unholy's ability to pump out NS on a healer kill target or something similiar is significantly inferior to Frost's.
Unholy also lacks the uber survival that was once specialized to it's particular tree. (Can no longer get Lichbourne AND AMZ, all DK's can get the full AMS bubble, ect.) This means that the only thing that Unholy has that Frost does not is it's pet, and the 3 things of goodness there are A) the 1 min, 3-4 second stun, B) the 20 second 2 second root/interupt, and C) the burst that can happen much more readily then Frost's burst (Via Pet into Abom) and the significantly larger amount of burst (Abom+Gargoyle+Unholy Frenzy). These 3 extra utilities that Frost does NOT have makes it a decent spec for Arena, where a single kill can pretty much be the game, but not so much for RBGs, where, instead of having to focus on 1 target, you have to keep track of ALL the targets and do a significant amount of single-target burst damage often. (Unholy does an extreme amount of burst damage every 3 mins. Frost does a lot of burst damage every 1 min.)