Okay i ll break it down for all , Whenever the cat cutoff percentile has been low for IIM shillong ( as is the case this year ), The waitlist movement has been very slow and very very less , WL moved by 80 the last time it had the cut off at 91%. Considering in the last few years, IIM shillong's popularity has grown , I don't expect the net movement to be more than 80....
It is as simple as , people who have been admitted at IIM shillong have no better converts or even calls