This hand cannon is made to obliterate the enemy killing most things in 1 shot and performs exceptional for bossing too, for sub stats you can do Firearm ATK, Firearm Critical Hit Damage, Weak Point Damage and if you plan on mobbing mostly you can run an element i choose electricity cause it's currently amongst the strongest since it can lower enemies defenses, but if you plan on doing a lot of bossing with it you can instead use Bonus Firearm ATK (vs. Colossus)