I did ten slow pitch in one day with one break several years ago, various ages nothing over 12u. At almost 53 I am getting to old to do that anymore. This year I did five 12u FP behind the plate with one break then did the final for six in one day. No one complained but I may have been bad all day so it didn’t matter. They had an IF game they wanted me to do but I went home, my legs started to go. Two on one off I think is the best. Sometimes if the sit too long you get stiff.