Front Bar:
Use [Pierce Armor]. and [Inner Beast]. as cheap melee/range taunt, note that [Peirce Armor]. also reduces resistance by ~9k so keep it active! [Heroic Slash]. to generate ult faster, and reduce enemy damage. Use [Radiant Ward]. when needed for some good aoe damage and a damage shield, and [Repentance]. when you're low on stamina. Use [Aggressive Horn]. to open boss fights and as your main ult.
Back Bar:
Keep [Igneous Weapons]., [Extended Ritual]., and [Restoring Focus]. active on you and your group as much as possible. Use [Stampede]. to close on enemies faster/open fights and provide decent aoe, and use [Silver Leach]. to pull ads into a pile for your DPS. Use [Reviving Barrier]. as mitigation to powerful boss aoe, or as a panic ult if you/party member needs to rez someone - secondary ult.