Kudos on the revamped Guardians global event
You can now damage protected enemies while you have the guardian buff. There's also a noticeable delay before unprotected enemies regain protection from another guardian. Killing a guardian also shocks all enemies on their fire team..
The original iteration of this global event was both fun and frustrating (particularly when a guardian spawns in a different area). However, these changes have made it far more enjoyable in missions.
Equip a high-RPM AR or SMG and go nuts. The Eagle Bearer in particular is hilarious with the buff :D