Yeah, no. You don't get to dictate rules when you willingly sign up for a Duty Finder party. Loot goes to whoever's the luckiest, that's how it always goes. If you want guaranteed drops, either ask for the loot nicely or (if that doesn't work) go premade with some friends who are willing to run the content with you. My needs are just as valid as yours and unless you ask, I will keep rolling.