I'll go with Luke hypothetically. Strange will no doubt be down graded drastically in his movie and his spell casting will probably take forever in movie time. Hell it would probably go the same way Hulk treated Loki and Thor, punches Strange while he's in the middle of reciting a spell to get a laugh out of everybody
Maybe I'm missing something but wasn't the only populated planet the Illuminati destroyed home of the Great Society? If I remember right all the other planets they destroyed were dead worlds already while The Cabal have actually been destroying populated worlds.