The Beastly Brigade is made up of Large Demi-Humans, some of them with wings. They employ slow, heavy-hitting attacks, and the winged ones can wields bows to attack from the air.
These enemies can combo-stagger players, often resulting in death, so avoid taking on all of them at once. Take them on one by one, as they can also be staggered in succession by player attacks.
Use jumping attacks or ranged weapons to deal with the winged enemies, or go near them to bait their melee attacks.