So I just pulled out my candle and dipped the spear, unfortunately when thrown it doesn't apply the extra fire damage either
I picked the other throwing damage item up again, from the bitterbang quest reward, problem is though it competes in the gloves slot - +1d4 thrown, Absolute gloves for bane or advantage when next to 2+ enemies damn.
Why are there so many nice gloves in the game, I can't choose!
I still haven't found a decent glaive yet for melee switch, but will keep an eye out for them.
