5 Chars Dungeon Powerleveling Multibox

[Apatheist]

I have no confirmation on all of this, happy to be wrong.

You're correct. Pyroclasm has a chance to proc when the spell is cast. It's the same for mind flay. Blackout only procs on the initial cast, not on every tick of the channel.

Intensity is quite good though. Especially while you're grinding low-mid range dungeons and using hellfire a lot.