I never really realized how OP burning head is, until stumbling across this guy:
So he had beam staff and obviously ran Resourceful Sharpshooter + either Exhaust or Fiery Heart. I don’t think this guy ever used RMB on hordes when beaming. He just stacked ult and kept throwing it again and again.
This craziness is only possible thanks to Resourceful Sharpshooter and Beam staff combination, so I think Sharpshooter as well as Heat Sink need some tweaking to work more evenly for different heat weapons (staffs and Bardin stuff). But for now I am definitely gonna try abusing the hell out of them, and suggest you guys to do the same. Cause fun!