Interesting idea. I will have to play around with that. I was also going to try to find a macro so I can hear the proc on my main computer, but never found anything. What is MSBT?

So, if I understand this you basically want to cast a couple of spells, it falls through to Pyro and then stopcasting. If Pyro is instant the stopcasting has no effect since it's been cast already, but if it's not it stops?? As long as you can button spam through the stop casting it might work.

Scorch isn't a problem for me with the glyph of improved scorch, only need to cast it twice.

I was planning to just switch to Arcane when 3.1 comes out solely due to Hot Streak. Basically, Hot Streak is what gives the Fire spec the edge over Arcane (I believe this is true anyway). So, if I can't use it I figured I would switch.