There should be a Nightmare sub-category for 2 days later.

Runs should have individual player counts (solo, duo, etc.) as sub-categories to balance things out. (a 5 player team would be quicker than a 3 person team as there are more people to kill enemies faster)

The devs have recently been updating the game, making it almost impossible to wr any cagetory. I think the leaderboards for affected modes should be reset.