The Fire Cannon is really slow and low damage at first, but when you combine it with Splinter and a huge horde, you get the most amazing thing ever
and with tome of rage it's actually amazing.
dont forget crossbow with max bullet damage with splinter and reaper rounds, complete crowd control right there
This build is absolutely insane. Pair this with upgrades that give you multiple bullets per shot, and, after killing the 5-minute boss, get the tome of power. Got my first win using it.
bro i got two wins, diamond with shotty and hina with crossbow