I don't have much exp I took Crocin Pain relief which has PCM and caffeine, I used once during my part 1 exam when I didn't have sleep at night, you should try anything for the first time .
Least duty hrs in West Bengal and 0 toxicity. Though Ipgmer has better faculties but some super speciality exp is less there as I heard from my friends.
I will place AIIMS BBSR as in Med 3 yrs post PG bond and post DM 3 yrs if in West Bengal. But learning aspect if you says hands on in more in West Bengal and workload is less.