I think I also have another way. Transfer list a player, and then change his playtime, he won't be mad. Then remove him from the transfer list without clicking Continue so he doesn't get upset. Don't know if it works in FM26 or not.

I use Knap Tactics, but I always turn Play for Set Pieces on as corners are so OP with the correct rotuines, but I'm not sure if that's secretly detrimental or not.

I personally like the training schedules with recovery the most, I try to keep my backup players sharpness as high as possible and recovery seems to preserve sharpness better than rest. Also I notice that for some reason the Attacking session yields an unusual number of injuries, more so than Defending or Overall. I could be wrong, but it's something I've noticed in my saves.