What if you could only mage ult if you had mapowner?

Exclude instanced boss maps.

Multi maging would be nerfed while solo mage stays the same.

You could exit/enter the map or cs/fm to reset mapowner for every ult, but you'd need to reposition every time. Doesn't seem very viable to me.

You could hog all the channels of a map. Now this is a real issue, but why not just make it against the rules to hog multiple channels of a map? That's the only solution I got right now.

You could just multi client and have your mages in diff maps. But this would still be a heavy nerf to the efficacy of multi maging. You dont have sweeper/mules for every mage and you'd have to choose worse maps.

Also rip duo mages grinding together. A worthy sacrifice?

Is this genius or stupid? Please discuss.