I haven't looked at a fire mage in a couple mods, but I do believe rimfire can get credited to the person that triggers it with chill.
Not really the question you asked, but something to consider if you are parsing.
for me it's roundly 3-5k a tick with swath of destruction
7-9k to 10-12k if you add 5 arcane stacks/combustive action buff or critical conflagration on crits
not a lot per se, really, but you can keep it going on on a lot of mobs till they are no more for some nice parsed numbers =D
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Not really the question you asked, but something to consider if you are parsing.
I have no idea how parsing works .... o.O
7-9k to 10-12k if you add 5 arcane stacks/combustive action buff or critical conflagration on crits
not a lot per se, really, but you can keep it going on on a lot of mobs till they are no more for some nice parsed numbers =D