You can bubble off the debuff on the 2nd boss, you need a bit of a threat lead which should be NP as a Paladin and then just cancel the bubble right after you cast it to get aggro back. I am not sure if BoP gets it off or not, I think not.

Another trick to getting rid of the debuff is waiting for a knockback then popping a run speed potion and kiting, but make sure you have his haste dispelled 1st else he catches you really fast. And, don't run too far from the portal or he'll reset. Best to pull him a bit away from the portal and have him knock you back towards it, then you can run the opposite way and get some distance.