At what iLevel does fire outclass arcane?

[:1]As Fire, it seems like on some fights my dps is pretty good, like around 35k, but on other fights it'll piddle around 20k. I've gemmed, reforged, and enchanted in every way that I can imagine and I'm starting to wonder if I should just switch to Arcane until I get some dragon soul gear. Thoughts?
Fire is very RNG, you'll have good days and bad days. but heres the breakdown...Fire can, on a good RNG, Do MASSIVE Damage to a boss...but only if the RNG Gods are with you that day. as for Arcane, it may not give that high of DPS, but it gives it at a Steady steam. So if your pulling 40k on a Boss, you'll allways do 40k on a boss. (In a nut shell give or take CDs and what not.


For now, Stay fire. and Pray RNG loves you that day ;3