Get a good tank and u can cure and buff all day

As glad i have provoke, taunt, wardrum, warmongerer, shieldbash and often cast protect and shell on myself to generate more hate as well as a few cures.

Additionally

Firm conviction, Self preservation, Fast cast and Intimidation all help the tank keep hate and keep alive.

Hate reduction happens when the tank takes lots of damage he/she should constantly aim to build up hate and keep topping it up.