A useful overview of what your staff will be utilizing.

Command Description
>award @mention/userID amount Awards the specified user XP.
>award rolename amount Awards everyone with the role XP.
>reclaim all/text/voice @mention/userID Resets the users XP, optionally reward roles too.
>reclaim left Removes level data for users not in your server anymore.
Level Up

If you're a Patreon utilizing Tree Leveling you can remove peoples reward roles, when they do >level up they will be able to redo their choices.