This is faster than the old co-op record but slower than the current single player. If you look at my keyboard you can see that I move around the map in a way to be closer to the entrance when the black screen fades. The advantage to Co-op is that you always get good rng with crown spawns, however, both players have to have good execution, which becomes the main bottleneck. Sub 21 is possible in multiplayer but I think it might be easier in singleplayer if you wanna grind the rng.

My volume is messed up so you can hear everyone but me.