https://www.cnet.com/news/fortnite-season-6-week-3-challenges-and-how-to-complete-them/

Obviously, for this one you'll want to play multiplayer games or even 50 vs. 50 mode to have the most opportunity for reviving teammates. But recognize that you only get credit for revives in different matches, so only your first revive counts towards the goal.

Ah yes, the fun staged challenges continue. The thing to know here is that when these challenges go live, everyone is going to be dropping into Lonely Lodge to complete them, so you might wait a day or two just so you don't have as much competition at that location. From there, you'll just want to follow the directions to the next locations in your challenge list.