Fine, let's just make it so that the rest of your pokemon can't be Dragon/Ground/Ice resists.
But anyhow, why not the Ho-oh with only SR-weak pokes and no Rapid Spin? It could probably be handled decently, and it's not complicated either; you just choose between Ho-oh and SR-neutral/resist pokes.
no offense but this is just stupid
gonna use the old phrase and say it will cause a slippery slope which will basically result in "hay we hav hoho in ou wit dese condisions can we hac arceus too??????????"
besides that meta just sounds 30x worse than this one