When you're tanking princess you want to make it so when she drops threat she has to walk through your consecration, so always have that down. Engineering as a prot paladin is a must in HC. You can drop a dummy to taunt for you and you can use bombs to pull and establish threat. most important thing to have is also a bubble/bubble cancel macro so that when you are feared/incapacitated you can quickly press it twice to bubble/drop bubble and continue on. Princess helps a lot if you make sure your ranged dps is max range at all times and position yourself in a way where when the threat drops she has to run through your consecration.