Kyle G. said: You might also consider tracking them in the individual tokens GM notes section. That would be hidden from the characters, but still allow you to manage them. The only downside is that you would have to open up the token information as well as the character sheet unless you have the npcs set up with token actions. A bit of creativity with API scripts would allow you to store, display, change, and retrieve spell slot info (in/from the GM notes) for mooks in an efficient way. That's a good idea for an API script that does not exist yet afaik...