Originally Posted by
Serene
The 3% crit is taken off the CM'd Fireball/Pyro/Scorch, not beforehand.
Critical Mass is present 100% of the time as it's a passive buff, the way you're calculating it is as if CM is only present once a spell has hit the boss; which isn't true.
Pre-nerf: 32*1.5 = 48-3 = 45% Crit
Post 5.1 Nerf: 32*1.25 = 40-3 = 37% Crit
Post buff: 32*1.3 = 41.6-3 = 38.6% Crit
Whilst the initial Crit nerfs were steep, yes, it's impossible to gauge exactly how much % of our DPS crit makes up. Considering that, pre-nerf Fire was head and shoulders above every spec of every class (even on single target) the new value of CM seems roughly correct, especially as we're still going to obtain more and more crit as we get more gear.