Originally Posted by
Raugnaut
DW frost tends to almost forget about unholy runes. Due to heavy mastery stacking, and low weapon damage for Obliterate, Obliterate does less damage then FS+Unholy Rune Usage. Thus, RC, which equally returns 1/3rd of a rune is worse then RE, which fully returns a depleted rune (Which will either be a death or frost rune if played right), and RC, which fully returns a depleted rune as a death rune (Which can be more reliable then RE, but will return less overall runes then RE). For 2h frost, its significantly better because Obliterate has a much higher DPR then Howling Blast+Unholy Rune, thus making the rotation full of Obliterates.
So, anyway, due to Unholy Runes having signficantly less damage value then frost/death runes for DW frost, RC falls behind as it restores 1/3 of all 3 runes, whereas RE restores 1 complete rune, which will be a favorable rune for DW frost.