Very nice Rain team here, Harsha!
That said, I don't see much that I could suggest for your standard rain team. I believe HP(Ice)>(Ghost) on Keldeo may suffice, as your current set is Jellicent wall bait. With this, it would also come to require something such as IcyWind, perhaps over Surf or HydroPump; your call. Seems to be all that I would suggest testing out for now. Great team! I hope this helps and good luck! :)
Keldeo: HP(Ice)>(Ghost); Surf/HydroPump>IcyWind