Like other humanoid enemies, you can CC them withskills, making them much easier to deal with.
Their fast attacks and gap closing attack make them particularly deadly. Try to focus them down before they Enhance, or otherwise wait until they're exhausted if you are using melee characters. Shields can also help mitigate their staggering attacks.
This buff lasts 20 seconds, and when the buff ends, they will be momentarily stunned have have reduced resistance matching their element. An icon will flash above their head as the buff ends.