[You typed amps where you meant to say watts in one place.]
Sorry about the emitter, not sure why things went bad - maybe the inductor as mentioned earlier?
The XP-G2 should be able to take whatever the XM-L2 can, and the peak output is just over 6A, so that sounds fine to me… Crash-testing a XM-L2 and a XP-G2 on copper Sinkpads
Remember that new XM-L2’s die at low current, around 5-7A or something, I don’t know. (Fish around BLF to get actual info.) New XP-G2s may eventually pickup that flaw as well.