Aloha Cleo,
Thank you for your question.
The Level II exercises are there to help your focus, healing technique, visualization, energy purification, and build the energy of your middle Dantain area.
Chunyi recommends doing the Level I exercises at the beginning for a while until you have made a shift in your physical well-being. This builds a strong foundation at the lower Dantain level before moving into Level II's middle Dantain work.
You'll always want to integrate the Small Universe mediation, whether you are in Level I or XXXVI
- sorry, don't ask about Level XXXVI, If I told you I'd have to blank you memory afterwards
But seriously, once you've been at it for a while, you could integrate the Level II exercises, or replace the Level I exercise with them - coming back to them if you come down with a physical illness or are drawn to work with one or all of them (actually, the "7 Steps of New Life" is wonderful in developing your energy movement skills that can significantly assist your Level II healing practice).
It gets into what your focus is on. No need to throw in all the exercises and mediations he's taught in a day - there are more of them than there is day. Look at what you want/need for your own healing and developement. Doing well physically? Then lets start developing our healing skills and heart energy and focus on the Level II exercises and build up your Small Universe time to an hour.
Much Love, Shawn