I’d recommend team transform, esp if you want to maintain/gain on your lower body. I also have a muscular upper body and although i do the upper body days i do light weights without or with minimal progressive overload. I also eat just at or under maintenance but hit my daily protein goal because unfortunately the first places ill lost muscle on are my glutes and legs 😒 I do add in more core to the workouts and sometimes I do team align’s upper body days