Caster Changes in 4.2 (RIP Casters)

[NovaLevossida]

Umbral hearts fill 2 roles. A filler spell (B4) in ice while waiting on Mana ticks, and trading time in Ice for time in Fire (A tit for tat GCD trade)

The 'tool' is directly related to dealing damage, so the merits of the tool will be based solely on whether you're doing more or less damage with it.

I'm aware of how the 'tool' works. If it was unclear, my use of past tense there referred to expansion launch, not any current debate about the merits of Bliz 4.