The Forever version lends itself better to “small” assistance movements for Push and ab movements only for the abs/single leg category. When I ran it I did push ups, delt raises, and tricep extensions for push, and ab wheel/hanging leg lifts for abs. I kept pull movements “big” with chin/pull ups and rows, and always aimed for 50 reps with them. It isn’t exactly perfectly balanced, but BBB is supposed to be a short block to grow and not a year-round program.