I have added new revisions to my Group Exercises page. The "Brass Warm-Up Routine" is suitable for an intermediate level student and is arranged for Trumpet/TC Euphonium, Horn, Trombone/Euphonium, and Tuba. The Advanced Fundamentals Packet is also available for BC/TC Euphonium and Tuba.
If you have any questions or feedback please post a comment below. Happy practicing!