The Honorable CapJack wrote:
I include Imp. RF in the builds for a few reasons.
A) Holy tree is not bloated, there are actually very few talents that are absolutely necessary, so going down prot to help survivability is a good idea.
B) The 6% DR as Celcio said, while it isn't super awesome, it's not bad either.
C) Even with Imp. RF up, you still aren't pulling as much healing aggro as other healers, so you don't really need to worry about that. To explain:
Healing already generates 50% aggro, as a typical game mechanic. If a shaman or a priest or a druid casts a healing spell, the amount of healing done is halved when calculating threat.
Paladin healing is another 50% of that, so if a Paladin casts a healing spell, the amount of healing done is divided by four when calculating threat.
With Imp. RF up, a Paladin generates 190% threat of their usual holy spells. So, 25% * 190% = 47.5% threat, which is still lower than the 50% than other classes do.
D) There are some raid fights in which the boss uses a special move or something that is designed so that a healer is probably going to get hit, and if you can increase your threat on that fight, it's better if the Paladin gets hit than if the other, squishier, healers get hit. So putting Salv on the other healers and putting Imp. RF up on yourself increases the probability that you are going to be the one targeted and the damage you are going to take is reduced by 6% more than usual.
Honestly tidewalker is the ONLY time you want to use it. Other healers should know how to play their class enough not to pull aggro and die. I have never seen a single bossfight, aside from tidewalker, that you would ever want to get more threat than someone. I know, in theory, all that sounds like a good idea jack but I can tell you through personal experience that its really really not a good thing to do. Save it for soloing, PvP, and tidewalker.