Current Luffy could beat all of them at once (Blackbeard was never a supernova).
Wano showed pretty convincingly the massive power difference between Zoro, Luffy, and the other nine supernovas.
Minus Uruge, we still don't have a clue about him.
I think it probably has more to do with how they teleported from Mareijoa to Egghead and why they were seemingly immortal. Then again we've already seen haki of that level drop Green Bull out of his devil fruit power.
It affecting Imu as well lends some credence to the theory that they're parts...