On WAR you will most likely use only these 5 cross class abilities: Second Wind, Featherfoot, Rampart, Sentinel, Flash.

On MRD it depends on situation but some good additions to have are: Cure, Protect, Stoneskin, Raise, Sacred Prism, Sanguine Rite, Blood for Blood, Invigoriate, Keen Flurry, Blindside, Quelling Strike, Chameleon.

You're mainly looking for abilities that help you deal more damage, keep hate and mitigate damage taken.