For cross class skills, I have Foresight, Bloodbath, Mercy Stroke, Featherfoot and Internal Release. Foresight and Featherfoot are good for when you have to tank something (along with Keen Flurry), Mercy Stroke is a free 200 potency attack (and properly timed can give you a nice chunk of HP back if you need it), Bloodbath is useful in heavy fighting when your healers can't get to you RIGHT NOW (or when tanking), and a bonus 10% crit chance is always nice.