Rather than fool him with another "Nusu Mkate" idea, We need to encourage Raila that he has the potential to capture #1, and also encourage him and all, that the Official Opposition Leader positive is a very important executive position that shadows the govt and keeps it in check.
Who is "we", and why do you believe that "our" encouragement would have any effect on Raila. The man has shown that he is very susceptible to poorly-thought-out ideas, the most recent being a funny "boycott", followed by a circus in which he was sworn in as president of some virtual republic.
Raila would probably be happy just to be called "President", with or without power. (As an aside, I'm not sure that he would know what to do with the power if he were a real President.) Add to that the fact that GEMA is, and has always been, loathe to lose power, and there's the possibility that Muthaura's idea is more like reducing a full con to just half a con, which is where, past betrayals notwithstanding, they might still get Raila.
See, if Uhuro & Co and Raila agree on a (powerless) President and PM (for Uhuru), then right off the bat you've GEMA and Raila's followers in the bag. The soft-headed/weak-kneed Western and Eastern chaps---Wetangula, Mudavadi, and Kalonzo---are no problem: dangle something "big" (Majority Leader, Speaker, House This or That, or a cabinet post), and they'll join the line so fast it will make your head swing. Then, right there you have enough support---the tribal sheep will always follow---for a referendum to change the
constitution and rewind to 2002/i]Kazi iendelee.[/i]