CSK should get someone long term. Bhuvi might not be the best choice. However, agree that he's a far better option than Chahar.
I think they will target a long term option. But Bhuvi is a very good short term one, where he can team up with Pathirana for death and also lead in PP. And can potentially play a full auction cycle.
I hope CSK can try for Chetan Sakariya. The boy wants to play for CSK, he is a good death bowler, a long term option and a left arm seamer in the mould of Mustafizur who did well for CSK this year.