Boosted this very quickly tonight.
Brand a warchief and all his bodyguards--the more bodyguards, the better. Find that warchief's "Beck & Call" symbol on the map and activate it. The warchief and his bodyguards will show up.
Go up to each one individually and press
to grab them, then
to dominate them. Press
to dismiss them. Grab the next one you summoned. Once they've all been dismissed, walk 20 feet back to the "Beck & Call" symbol to rinse & repeat.