Great job.
Have you thought of possibly using sprites for the fire?
I'm toyin with it right now, and it's got some GREAT potential for realistic fire, because you are mapping it with real flame footage, with the particles animation controlled by a fluid node to get that "fluid-flame" motion
Might wanna try it
Looking great so far!
Israel "Izzy" Long
Motion and Title Design for Broadcast-Film-DS
izzylong.com