Title says it all but to clarify, when playing on single player there were a few times that the computer AI would run over and smash a weapon rack and drop their crystal weapon (basically the best end-game weapon). I hope this can be fixed in a patch.

If you have opened up your 2nd weapon slot, always put the weapon you want to keep into your Primary slot. The second slot gets freequently swapped out so always keep your Best weapon in your Primary Weapon Slot.

I don't know about the bots but after playing up to maybe Act 3 with the Crystal weapon, a weapon of the same type (fast) dropped with 2 times the damage and I switched and never looked back. the thing can 2 shot Minotaurs on Old School while buffed with that shield breaking icon skill.. or 6-8 shot without the buff and that skill, directly to the head. The crystal bow when I switched back to test, just couldn't do it. I also stick with medium, slow bows more though.

Well I Cannot Comment on Crystal weapons because I have yet to Encounter any of them. I probably Still have stuff and secrets to find.