What about porting JTE/DoD/Kami MythicMobs dungeons?
This these rounds would last 10 minutes. Dead players would be spectators for 30 secs. Round would be lost if players ran out of time, and won when boss mob was defeated.
Other gamemode would be Juggernaut - there would be player will fullly enchanted diamond armor, sword, potions and food.
This gamemode would last 5 minutes and objective would be to kill that juggernaut.
Alternatively there could be one juggernaut per 5 players, for version without enchanted diamond stuff.
That gamemode would be of course implemented after finishing out current gamemodes.
This these rounds would last 10 minutes. Dead players would be spectators for 30 secs. Round would be lost if players ran out of time, and won when boss mob was defeated.
Other gamemode would be Juggernaut - there would be player will fullly enchanted diamond armor, sword, potions and food.
This gamemode would last 5 minutes and objective would be to kill that juggernaut.
Alternatively there could be one juggernaut per 5 players, for version without enchanted diamond stuff.
That gamemode would be of course implemented after finishing out current gamemodes.