Assuming 2 or more targets, the common opener is Shield Lob -> Flash -> Flash. That should keep everything off healer for a while. Moves beyond that varies quite a bit.

DPS is using all AoE effects? Flash more.
DPS going hard on the 1st single target? Go enmity combo.
DPS splitting a bit between main target and others? (summoner dots is a good example) Enmity combo & work in an occasional Flash or target 2nd with part of your enmity combo.