Chainreaction with IM + thorns-aura

[Baajikiil]

Very few if any Paladins actually use this skill (that I've seen anyway), they may use it until they get something better (about 5 character levels), but other than that you'll usually only see it on monsters.

I suspect you might also see it on act2 NM mercs often. Many of my characters use might mercs to bolster their physical damage.