Sora_92
Terrarian
Agree, though it might be good to try to battle queen slime, just to try out that battle too.She doesn’t really drop anything useful at this point in the game.
The armour set she drops isn’t as good as Hallowed, but I guess it is tiered a bit before it. The Blade Staff (another minion staff that she drops) is insanely powerful with summoner gear and a whip or two, but as a support weapon it is pretty bad, and overall it’s outclassed by the Desert Tiger. The mount she drops isn’t as useful anymore, its flight time starts to be rather lacklustre compared to wings available after Plantera.
However the hook that she drops is one of the best in the game, it teleports you to the hook instead of drawing you in, and you take no damage on the way.
On an unrelated note, Bone Lees in the post-Plantera Dungeon drop the Black Belt and Tabi, which are used to craft the Master Ninja Gear. The Master Ninja Gear is both a mobility accessory and a defensive accessory, it allows you to dash which by itself is great and it also provides a 10% chance to dodge attacks which can save you in some situations but isn’t as reliable as Hallowed armour.
Also, dissonance hook is great (though I would argue if it's the best, rather, it's a very unique hook), but less necessary, when you already have the Rod of Discord.