Knight Champion Objective On Apex 7 Too Difficult

Whenever I play firefight on Raid On Apex 7, an objective I commonly come across is one where you have to eliminate 2 Knight Champions. It wouldn’t be so bad if there weren’t so many other promethean’s you have to eliminate. There are so many that spawn that you die in the first 3 seconds you come across them, and don’t even get me started with those stupid Watchers! You put some damage on the Knight Champions, but that won’t matter because Watchers spawn almost immediately and fully restores both Knights!!! I have never passed this objective because it’s too difficult!! Did I mention this is a ROUND 2 OBJECTIVE!?!