It's all about choosing the right progression, front lever and planche are not hard if you start with the lean planche and tuck front lever, i for one started training the front lever when I could barely do a pull up and got it before the muscle up in the other hand the muscle up is a dynamic and is not that much about progression. The thing that helped me the most on muscle up is weighted pull ups, and you can do all thes 3 at once thers no problem.