Yeah Raila is Ruto biggest threat - and has been for sometime - ever seen he came with his NDP trojan horse - and took off "KANU" or "Non-GEMA" constitutuency to LDP from Moi's KANU - and then later Ruto took the remaining -Kamatusa - to form ODM. Ruto has Raila on his crosshair for that reason.
Ruto has to work hard to bring back the "swing" non-big five kabila vote to his corner from Raila corner - so far I think he has done it -- we just need 2017 election to confirm this.
Once Ruto has the old Moi KANU constitutuency - 35% - of kenya - then it questions of who to make a deal with - 1 or 2 of 2 OR 3 BIG TRIBES - GEMA are the first obvious choice thanks to gentleman Uhuru- but if things don't work out - then Ruto will just need another big tribe - to take DPORK & 50% of the vote.
Therefore Ruto has to keep hitting Raila with everything he got. With Jubilee party - I expect to see Ruto finally upstaging the old, broke and tired Raila in 2017 --finally reducing ODM to it's NDP core.
So don't expect the war btw Raila and Ruto to end - it not personally - it business - Ruto has to bring back COAST, KAMATUSA, Somalis and their allies and all small tribes back to "KANU". The last election Ruto succeeded in bringing about half of them back - Raila still has about 50 non-gema MPS that Ruto wants.
Raila if he remains with his original Luo constitutuency and GEMA remain as ever inward looking - then Ruto has NO REAL competitor for 2012.
Raila sees this and is powerless to stop him. Works crazy to thwat JAP in Maa, coast and western. Ruto's strategy to be de facto non-Gema leader is time. With Gema slice he could be unassailable in 2022: first Kenyan to score both divides 
Raila remains Ruto's biggest threat. Noone else has the grey matter. I am with you. We don't have great politicians for sure. Your WSR fetish would crash big-time should he disappoint once on the tower.