As for my own training, it's been pretty simple, yet consistent, for the last several months.
Several days a week, I'll do one extended set of heels elevated, knees-over-toes style (Goblet) Squats.
For upper body, I use a protocol I came up with I call "RPTS" - rest pause tri-sets. Simply put, it's a tri-set of an exercise where two higher rep sets sandwich a lower rep set. It could be as little as one rep or quite a few...the idea is to be able to do harder / heavier / more difficult / etc work, yet extended it out across much more volume - both in a single set (round), as well as in total. Doing this with weighted Pushups, extended range Pike Pushups, Chins, etc.
(I'm in a bit of a "backoff" / deload period now, but to give you an idea, when I'm going all in with it, this method has me doing a good 350-375 Chins in a week.)
Then I ruck six mornings per week.
Some other odds & ends, but that's the 80/20 of it.