Graf
Explorer
It's an interesting problem.
I would probably try to adapt several of the suggestions. Have a "main" combat session oriented around bigger set piece battles, and then work with the second co-DM to create multiple threads for the groups to follow and split them.
(And embrace the idea that time is weird and fluid, so when they get out of sync it's not a big deal).
Lotta work, but the group will naturally "size down" as people get frustrated; may as well manage it.
I would probably try to adapt several of the suggestions. Have a "main" combat session oriented around bigger set piece battles, and then work with the second co-DM to create multiple threads for the groups to follow and split them.
(And embrace the idea that time is weird and fluid, so when they get out of sync it's not a big deal).
Lotta work, but the group will naturally "size down" as people get frustrated; may as well manage it.