You can mix any and all oil based steroids in the same injection. Just remember that each muscle is only going to hold so much oil comfortably. The bigger the muscle, the more oil it will take. Glutes tend to be best for larger 3cc injections, where as I don't like to put more than 1.5cc in a delt. Plus, your delts might not be the same size as mine. That too will play a role.