Corrupted Mass Map - What Rarity Map Required??

Hey GGG,

When I'm trying to load the main corrupted mass map, there's no indication what rarity map i need. I know its rare, but not a basic rare so i just have to randomly juice up the map until the it accepts it. I don't know if its a glitch or what, but some info would be helpful. TIA

4 affixes are required. I only know because I came here asking the same thing and also stumbled on it watching YouTube 😡