I run 20 characters. The easiest way to see all 20 health bars is to use VFX to see the other groups from one of the group members. GridConfigurableLayouts is busted and was causing WoW to automatically reload and turn off all addons due to LUA errors. I was hoping I could use 4 different Jamba teams and use the VFX of that to see the health bars. Unfortunately, that means I'd lose most of the rest of the functionality of Jamba!

I found a Grid addon that lets one filter to see only specific units you add to the list (like GridConfigurableLayouts, but better) that is updated regularly.