Its synergy with anyone that can get into the fray, Sonya + jump with upgrade on lvl 20 makes it so they can't escape the zone without a dash.

Same with Illidan ult and tyreal judgment, cast on them while they get charging so they get stunned by the ulti hit followed up with the bomb.

My favorite I think and easiest is E.T.C and just cast it on him halfway into his song, stun everyone inside right before the song is done.

TL:DR It is great on anyone that can get into position fast

It is also underrated that it peels for backliners of melee or bruisers even for a moment to avoid the 1.25 stun duration can be the difference between someone die or live,