The inclusion of two foreign spinners in the squad is nothing but nonsense. When they have great native spinners like Jadeja. I think a foreign pace bowler should be included in the squad. And foreign batsmen should be given a chance. Foreign batsmen perform somewhat better than domestic batsmen. On the other hand, Moin Ali has been bought at a much higher price. Looks like he'll be in the squad. If he fails to perform as expected, Imran Tahir will be given a chance.
Tahir is just unlucky. He is one of the best spinners in T20 format, despite his age. But CSK is one of the teams that depends heavily on overseas players and therefore it is difficult to accommodate him. Also, middle order is the weak spot for CSK and they need someone like Moeen to strengthen them in that component. For most of the other franchises, Tahir would be an automatic selection for the playing XI. But as I said, he is just unlucky to be with the CSK.