i have:
cutter
blaster
wolver coat
cobalt helm
owlite shield
i focus on dodging and using the blaster to kill enemies, and if i encounter enemys who dodge gun shots or i get surrounded, i use the cutter to kill or crave a path though the enemies.
The expert players, whose advice you apparently seek, think entirely in terms of 5-star equipment, because that's where it all ends up. Here's what I see when I look at your list:
So keep your shield and suit. Replace your helmet. Read the wiki page on Damage, to understand normal damage vs. the three special kinds of damage. Weapons that do normal damage are general-purpose. If you want to carry a sword and a gun (and no other weapons), then it's not crazy for them both to be normal. But consider making them distinct non-normal damage types instead. Then you can deal massive damage to 4/6 of monsters and moderate damage to the other 2/6 of monsters. If you decide to carry two swords or two guns, then neither of them should be normal. (Bombs are a little idiosyncratic, so I'll leave them out of this.)