Got a much better run while trying to get X-Rank, and I still think that category should be deleted. It's not only a deathless run, but also you have to do an insane amount of combos while being fast at the same time. It's right almost impossible, given the amount of RNG of the spawns and the level of focus one must have through the whole run. it's extremely hard to kill the boss in 1 try right after completing the previous 30 levels. Of course it can probably be done, but only on a lucky run after insane amounts of grind. So it's more of a challenge rather than a speedrun, and so I think the category shouldn't be on this page.