Well you have a pretty solid loadout!! but gremlins and beasts are gonna drive you crazy! so, what i suggest is getting, not a gun, but a sword. As for your guns, you have undead and construct covered perfectly, You can still ahniallate slimes and it just so happens that those 2 guns seem to be exceptional for taking out most of the finicky fiend family. Now, beasts and gremlins are what you have as an open spot, both families dodge, both families have fur(but that doesnt matter!). Now, youre going to want either a piercing, normal, or shadow sword. I would not reccomend a shadow sword, its not really required. A normal sword is great, i would get leviathan, its charge attack would set groups up perfectly for a volt driver charge attack. But if you get a piercing sword, you should get a flourish or rigadoon. They are fast, very specific-target oriented, and are also a great coverage against firnds, just in case they wont seem to get shot in the face.

if you want gun coverage though, i would definately reccomend Blaster, Or callahan. The blaster is a great gun all round, dealing normal damage, fast firing and relatively fast moving shots. You can easily say that the blaster will stick with you whenever in doubt. Now the callahan, it fires 2 heavy shots before reloading, and you walk rather slow while firing, chargig, and reloading. This gun is a bit of a risk, so attack speed increase is an absolute must! The bullets fire so fast, that dodgers will not be able to dodge, and almost always knocks your enemies down, along with the occasional bonus stun, this gun was born for killing things that bear fur and fangs, and thats just what it'll do, but be cautious, and always shield cancel.