Boss Battles Thread

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Duo'd Hell Gollux with [MENTION=618]Takebacker[/MENTION]; but i fucked it up and went out of the room last minute not knowing it decreased the difficulty rating, yay

Leaving the map has nothing to do with decreasing the difficulty rating. How it works is, the first person in the party to enter Gollux's head, essentially summoning him, gets difficulty 4. Everybody else to enter the head after that person gets difficulty 5.
Furthermore, it seems that if that first person leaves and re-enters again, unless everyone in the map also leaves and that person re-enters first again, that person also gets pushed up to difficulty 5.

This provides some confusion because I'm not exactly sure if difficulty 5 even has a correct drop list, or if it's just the game going crazy. All I know is the only times I know of a Superior item dropping, the person who clicked was on difficulty 4.