This right here is the answer to it all. Bosses with at least two loot tables to pull from are the best (a Primary Loot Table that has one or two items that the specific boss has a higher chance than any other source of dropping and a Secondary with a mix of drops that are global and a few here and there from other bosses). The trick is making sure that even with these tables, the secondary table doesn’t just have access to everything that drops - it should still be restricted, but keeps 99% of items only having one source.
Let’s be honest. This game is designed to maximize fun, and there’s no game value lost in offering players a couple of ways (NPCs to kill in this game lol) to get the same item. (I wouldn’t even mind if the primary drop targets were the only ones that had a chance at the top 10% of stats in each category - though that could get abusive really quick by devs who don’t understand balance outside of pen and paper and I’ve yet to see any that don’t fall into this issue lol)