Yes u must

Hats off to even considering such option. Form it and go for 2014 Elections. In first place go for 50 odd seats from those areas u think after detailed silent survery/investigation,where U could put good fight. But be sure to include BIG WIGS of each Political party e.g. Rajmata-S, Baba-R,Kapil-S,Salman-K,Cdmbrm,Ravi-V,Sharad-P, Supriya-S,Sharad-Y,Mulayam,Yadav-L, Behenji, Advni,Swraj-S, Abdullah-F and like. If u could even win 20 odd seats by beating even 50 percent of such big wigs, half the battle would be won to take care of War in next go.

I think they should tell BJP that " If BJP brought Janlokpal in all their ruling states, we will support BJP and will fight election from BJP"

No. please, All are birds of same feathers.