I mained MCH in HW for a while. It was rough then, watching your Wildfire get lost to boss mechanics. Tried picking it up again in SB after I leveled my Samurai and after 1 level of playing, I haven't touched it since. The leveling experience with a heat gauge and zero way to control it is annoying. Having to reapply Gauss Barrel after every overheat is annoying. And I can't imagine the waste that flamethrower is when you basically only use it briefly to overheat yourself and try to cram all your damage into the next 10 seconds. 15 seconds was bad enough in HW. It's the only class I know of where one mistake can completely kill your DPS.