Okay, I followed all the advice here, and I still can't complete these stupid speedrun quests. It keeps giving me the mini-bosses with ten health bars that take forever to kill. Am I just expected to get lucky with RNG and make a high upgraded weapon to solo, or what? Mine is +6 and it still takes an eternity to clear a room and/or boss. Is the rest of the game like this? I don't know if I want to continue if it's going to be this rough to do these solo quests.