Weekly challenges give stupid amounts of XP, and you can optimize them. If something wants you to use scouts a bunch and progresses slowly, and another wants you to play some strikes and crucible, use a scout in there. Grab bounties that complement what you’re doing.

I would keep an eye though on some weekly challenges and see how fast they’re progressing. It isn’t worth doing a challenge that’ll take 20 Gambit games if you’ve finished every other Gambit challenge. Try to get the best bang for your buck. The seasonal story is always a good way to do that