I wanted to go over a couple things about the primary slot but i wanted to preface by saying that I really do love the game and have been having fun with it for a while.
Firstly, they're pretty useless compared to spells. I feel like spells get higher in damage (i think they scale in damage with the monster level you got it from) much quicker than weapons and I think its mainly due to the fact getting higher weapon damage is more luck based (including finding hard juice because that's really annoying to find, at least for me). What I mean by luck based is you need to have good damage rolls on the weapon. At higher monster levels I feel like the weapons just become like accessories and whichever has the highest modifier levels are the best, instead of using them as actual weapons. Also, melee in general needs a buff, I feel like I can at least use a projectile weapon with a good damage roll but if I get a melee with a high damage roll its feels lack luster. Btw the derptera is very fun to fight, I think its sick how they fight other enemies. also i really like how they slap things instead of just walking into them.
sorry if this is just rambling