Arhaan I feel was a good guy and was slowly making his way. He really played the tasks well especially the captaincy task (Rakshas wala) However, Rashmi and Devo instead of supporting him were manipulated by Paras to support Vishal and give him a free pass. If Rashmi/ Devo had thought the game through and instead of Rashmi's concentrating on mythical long term plans, would focus on the present game then Arhaan might never have been in the nominations. So questions of more/less vote would not even be there.
Paras and Mahira are very clever, they have been manipulating the TV bahus to go forward in the game. Actually, Paras always wanted another guy on his side and Vishal's entry has been God send for him. He feels that he does not need Rashmi/Devo. He always has been using Rashmi, and sorry to say that Rashmi in her hatred for Shukla has been blind to his manipulation. Even when he saved Rashmi from nominations in the phone task it was only because he was very confident that there were much weaker players already nominated so even he is in the nomination's list he will be saved. For him Rashmi/Devo and Vishal are just pawns to stay in the game and in his mind currently pawn Vishal's vaue is little more than Rashmi/Devo. Mahira just follows him for remaining relevant.