Ruto and Raila cannot work together, they are both hyper, Ruto is ripe for presidency right now, he is what I would call the Raila of 2000s. Can he play a second fiddle again to Raila after playing that role for two terms to Uhuru? I don't think so. Can Raila accepted the deputy president role when pairing with Ruto? I don't think so. History has taught us that being vice/deputy president is a thankless job, when your time comes to go for the top seat you are always sabotaged by your boss (outgoing president)