Quote Originally Posted by Ultimatecalibur View Post
It does work on Titan(NM/HM/Ex) and Demon Wall knockbacks (and possibly on Leviathan's ship slams and Garuda's whirlwinds). The 3 min cooldown time is more of a problem; in those fights it will make a Paladin knockback immune to one Upheavel/Landslide or Repel per fight if properly timed.
On Demon Wall, just plain blocking the Repel also negates the knock back as well. I remember because my first couple of times in there, I saw it happen a few times and thinking that was cool as hell.