Realistic scenario- Raila wins.
Raila like Kibaki of 2007 cannot govern without Ruto - he would struggle to form gov - and would basically have to overthrow constitution - because they have cocked up nomination - entire Azimio crew have given sitting Mps/senators/governors - direct ticket - ODM/Wiper/Jubilee - that tells you- they are going to lose 60% of their current seats - because you can bet many incumbents are very unpopular. So Azimio crew will be dealing with 20Mps from Uhuru, 10Mps from Kalonzo and 40Mps from ODM. You cannot govern nothing with that. Even if they bribe all independents and small parties...it will be so difficult.
So Raila will simply throw out Uhuru, Gideon and Kalonzo - and bring Ruto in - another NARA thing - to be able to rule.
Realistic scenario - Ruto wins.
Ruto has nailed nomination - conducting very credible nominations - and is definitely going to get 50% of Mps - 170mps - required to govern. Ruto will not need Raila - or Uhuru - or Kalonzo.
All the three by dint of age and limits - will quietly retire.
Ruto will run unchallenged for next 10yrs.
That I fully buy. I've said it before that Raila & Ruto will be in the next government circa 2023.
There's a caveat: if whoever wins acts faster than lightning by weeding out Uhuru traps & calling others to shift loyalty. If not there's always the Buyoya Curse (Burundi).