Overload damage is not compiled for WF damage. It is not supposed to be used as a dps ability to be used whenever it's available. Nevertheless it's too weak, I agree.
Also, I believe that FT shouldn't be used under normal circumstances on a single target, except for going overheat if you're missing that 10 heat for your next wildfire and only if you're barrel stabilizer will be available after the barrel off penalty is removed.
