Taunt is not a regular part of any threat rotation nor is Demoralizing Shout. Taunt is temporary and the threat from DS is miniscule. You're wasting precious early GCDs by using these before you have initial aggro.
Mark Skull ahead of time. Charge that target and Shield Slam it. Thunderclap to get everyone else's attention then cluster the mobs and Shockwave them. Then begin a cycle of Revenge, Shield Slam, Devestate, Cleave and Thunderclap. Stop Cleaving if only two targets remain.