Kartik and Powar might dispute the claim that Mishra was treated more roughly than any other spinner.
Most bowlers with 43 wickets in 13 matches at an average of 43 should expect to get a lengthy spell out of the side. And Ashwin (fastest bowler to 50 wickets or something wasn't he?) and Ojha did really well up till the England series.
I think Ashwin at 6, Dhoni 7, Mishra at 8 with Ojha at 11 has a reasonable look. Classic three different types of spinners.