This probably applies to other classes too but I was on my DK at the time. Anyway, on the Windward Isle off the coast of Jade Forest, there are Shadowfae Tricksters that place a debuff on you called Fae Touch. It reduces you armor but also the cost of your abilities for 1 minute. Let it stack until your Frost Strike or other RP ability is free (then take a port or something to raid?). It lasts 1 min so may be limited in use, but hey, if it's free its for me!