Same difference. ;x
Either way, heavy and oni are not rankable as is. There's a difference between difficult/challenging hard and stupid hard. If you're happy with them as is, it can remain like a Max Forever-ish map and just stay perma-unranked while still being played by others, it just won't count towards the ranking.
If you do want MAX 300 to be ranked, I suggest just making a second version of this with easier (relatively speaking) hard versions, while keeping this one as is.
Either way, heavy and oni are not rankable as is. There's a difference between difficult/challenging hard and stupid hard. If you're happy with them as is, it can remain like a Max Forever-ish map and just stay perma-unranked while still being played by others, it just won't count towards the ranking.
If you do want MAX 300 to be ranked, I suggest just making a second version of this with easier (relatively speaking) hard versions, while keeping this one as is.