If I’m going to do A-B style training done 3 days/week with A) clean, squat, bench
B) clean, dl, press -split, should I always do the main work for both movements or go to other movement as main set and other as supplemental?
I have done this earlier with other movement as main work and other movement as FSL. I also have seen you recommending 3 days/week program where you’ll do always main work for both movements. Is there some situations when other is superior to other?
If you are doing three big lifts per day, I wouldn’t recommend doing “main work” for all three, all three days. I wrote an article awhile ago about how to design your own Full Body Program, with step by step instructions of how to do it, what to consider, etc. I have no idea where I wrote it though.
You are better off training in blocks, like the Beyond book recommends.