I'm tired of this. Jelly Palace, never mind the King itself, is too difficult for 90% of players. Every gate that spawns with Jelly Palace is one less gate that I can use.
At the end of the Red Carpet Runaround there should be two elevators with group buttons in front of them. One takes you to the Jelly King, and the other takes you to a map with a more typical difficulty for the last map in T2. Have us fight the Jelly Royal Guard or whatever instead.
You can always choose to go up from depth 16 rather than down the last elevator.