Regardless of what offensive system you use, I think you can get some ideas from this video. Not just the movements and spacing, but also how to work on your system and how to practice what you want to see happening. It is also a very good way to make sure that you are covering all of the reactions that your players need to make when the defense disrupts your actions.
What do you want your players to do if the defense takes away your entry pass or other cuts and movements that are integral parts of your offensive attack? You might not be able to simulate that in a live practice scrimmage, but
I really like the idea of calling out specific actions that you want to see 5 on 0, and even 5 on 5. Especially if your second te.am is not able to challenge the first team. If you want to take away specific options, you can