Rafique had tipped Mosharraf Hossain Rubel as his successor. He was actually pretty decent until his silly decision to retire to play for ICL. In that time Shakib has established himself as our number 1 spin bowler. He has surged ahead, and like Gowza said is way ahead of our other spinners. BCB now seems to be keen on developing Elias Sunny-which is fair considering the guys impressive start. Razzak should be the other choice in ODI/T20's while we should try Enamul as third choice in tests.
After that Arafat Sunny, Shuvo, Saqlain Sajib, Nabil Samad. Unfortunately its all SLA's. This is why Saqlain needs to spend time with guys like Sohag Gazi, Noor Hossain. Unless we add variety to our attack we will remain very predictable and one dimensional