Shiki has the homefeild advantage here considering that all of those islands are under his complete control. It is for that reason that i give him the edge here
Onoki is not on the same level as Shiki thats why its 5 vs 1. Onoki has to be constantly touching the object to direct it where he wants to go whilst Shiki can simultaneously control anything (apart from living things) he has levitated after touching it once & he says it wont be undone unless he undoes it or loses consciousness.
Wow your underestimating Shiki & overestimating the Kages a lot. That's like saying Magellan/Enel/Crocodile/Lucci & Moria (if he used his devil fruit how I would use it) will not kill most if not all of the Kages.
Do you realise I gave Shiki prep & he is bloodlusted he could essentially do a Madara & make the islands fall like meteors...
Why do you believe Shiki would be defeated without killing 3 or 4 of the Kages?
Onoki weight control ability was capable of holding off one giant meteorite the size of a mountain, he also lifted the giant turtle island with one hand with complete ease, and break through Madara's defense.... That said what can Shiki do? Gaara's sand could be of assistance as his sand works well with Onoki's weight manipulation, there's also the Raikage who's stupidly fast for a Naruto character and has crazy strength along with Tsunade's medical abilities and Mei's Lava-steam control!
He held of the that mountian sized meteorite with the help from Gaara. Can he hold off island sized meteorites simultaneously coming at him from different directions?
I have said this in countless other threads that turtle lifting is not a feat because he used a jutsu to enable the turtle to loose enough weight for it to float, Onoki was only guiding the turtle to the appointed location.
He broke through with many combination attacks with the other kages & Madara's incomplete susanoo is not that great, Itachi's is still greater.
What can Shiki do?
He has complete control over the battlefield. He can shape it and manipulate it how he wants. This should really be enough but he can also fire sword projectiles, can fly, can easily keep up with gear 2 Luffy.
What can the Kages do?
If a bloodlusted Shiki drops the Merveille islands on them. Gaara & Onoki just about survived 2 mountain sized ones.