It is obvious Aakash and Chetan had an alliance when they came in...they have talked about it to ...one instance was when Akash chose Chetan to not take the challenge even over Negar whom he has "become close" with. So I think whatever happens these guys will take care of each other and try and manipulate to get someone else out. Marc has joined this alliance too and Mona will soon be in there also. However when it comes to final 4 if these 4 survive then Mona and Marc wil probably go and Chetan and Akash may remain till the end.