Hi! I have a Rad/Fire/Fire, but I didn't do much with procs... so not sure my build is what you are looking for. I'm loving this build. I built it for survivability, so it can handle a quite a bit. It is a bit expensive though.
Hero Plan by Mids' Hero Designer 1.962 http://www.cohplanner.com/
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Rad Spill: Level 50 Mutation Blaster Primary Power Set: Radiation Blast Secondary Power Set: Fire Manipulation Power Pool: Speed Power Pool: Leaping Power Pool: Fighting Power Pool: Leadership Ancillary Pool: Flame Mastery
Hero Profile: Lev