rajbir: even after the event with his father...she may still want to keep rajbir around for now in case he changes his mind and decides to come back to her
yash: it is pretty clear that yash is her backup now..so he has to stay
gaurav: quite a few girls are interested in gaurav since he hasnt completely made up his mind...so i do think priyanka would want to face their wrath by eliminating gaurav (although i think gaurav's mom should go)
now it is between hitesh and vivek
i honestly dont think that priyanka would make the mistake of eliminating hitesh...cuz that would mean clearing the path for pooja and rajbir which she doesnt want (although his mom should also go aloong with gaurav's mom)
that leaves vivek...no girl really has an interest in him (maybe nandita but she is also leaving soon IMO)
so there is no point in keeping vivek around....hence he will be the one to leave