mcMMO has limited support for some optional features when used with other plugins, such as World Guard.
Feel free to ask for support for integration with other plugins in the discord, or to expand existing support, I'm always open to suggestions
mcMMO registers three custom WorldGuard StateFlag values for per-region control of skills, XP gain, and hardcore/vampirism penalties.
See the WorldGuard Integration page for the full flag reference and usage instructions.
The latest versions of mcMMO have built in support for PAPI, no need to download anything from the PAPI ecloud.
See the PlaceholderAPI Placeholders page for the full list of supported placeholders, including the skill, party, XP event, and leaderboard placeholders.