Using Hot Feet + Fire Cages I'm least 8-10 and they were blue -lvl of me. I did better w/ same level cons :) Can't wait for Hurricane!!
Hot Feet - Fire Cages - Hurricane = AoE Dmg x2 (containment) -to hit 25%+ I was also thinking Radiation for CC but you get that like 8! lvls later, but after this took hits 50 someday I will check it out too.
The pic is med res, I try not to run to high settings due to I don't have a vid card :)
Fire/Rad is the second best farmer build, for all farms. Second only to Fire/Kin.
The secret isn't in Choking Cloud. That's a nice power, that adds a little extra safety, don't get me wrong. But Radiation Infection mitigates 90% of the incoming damage, and Enervating Field results in dead enemies really fast. Fire/Rad is much slower than Fire/Kin, because it relies more on -res than massive +dam, but it is also infinitely safer, with Rad Infection making it so you almost never get hit, at all.
I hope controllers get Dark Miasma in Issue 12. Fire/Dark would outshine Fire/Rad as a farm build, I think...