For 100% on 6-C you have to do the level twice for all 3 star coins. For the IL would I just use RTA timing or would I just add the IGT from the second run?

Maybe the best is have a "front door" and "back door" IL for 6-C since it's impossible to 100% this level in one go.

ILs like these just shouldnt be ran imo. no matter what you do you end up in a situation where the rules dont directly apply. and with a "front door"/"back door" category, you would then add those to every single IL.

I'm going to edit the boards whenever I get the opportunity to separate some of the levels with secret exits into different level categories, as well as the back and front entrance's of Roy's Castle. I know for sure NSLU and NSMBUDX have split categories for those purposes. Sorry for the inconvenience.