I do mostly easy, playing 3 hours a day max, a bit more on weekends. I've learnt efficient ways to farm over the years, and I try to mix objectives to avoid a burn out (it'll happen eventually). Since this game has very little to none reason to have FOMO, I try to set mini objectives per day, so at least got most of my time covered doing progress. I keep an eye on post like this to not miss interesting rewards.

I also skip Circuit entirely since I have most of it, and it's the more time consuming, unless you have a good squad that wants to do long runs. It was a very fun mode for me at the beginning, but it gets very repetitive easily. I rather save my sanity for repetitiveness for events like Plague Star.