Would a final boss only category seem likely? Granted, there's not really a whole lot you can do, but i see a good bit of people who like to beat the final boss as fast as they can. my current time is 1m 11s but I'm sure people can find ways to beat it faster. of course it would start from the start of the Bowletta fight and end when the death animation for the soul starts. Definitely an interesting challenge whether its a category or not