Managing Multiplier Groups

Understanding the Format

To start off, here's the format for group multipliers.
multipliers:
GROUP_NAME:
mobs:
- ENTITY NUMBER # Decimals are supported.
weapons:
- MATERIAL NUMBER
worlds:
- WORLD_NAME NUMBER
When you fill this out, it should look something like this:
multipliers:
legendary:
mobs:
- PIG 1.1
weapons:
- DIAMOND_SWORD 1.2
worlds:
- real_world 1.2
Not all tags are required, you may remove any section if you don't wish to use it. For example, you can remove the "worlds" section from the group if you have no world-based multipliers.
multipliers:
legendary:
mobs:
- PIG 1.1
weapons:
- DIAMOND_SWORD 1.2

Dealing With Multiple Groups

When you assign multiple ranks to a user, the plugin depends on your permission plugin to tell it which group has higher priority than others. You may notice that the plugin may incorrectly give the wrong multipliers if your weights aren't set up. Most, if not all, permission managers come with a weighting system. Here are their links to read up on how to do so.
By determining weight, such as the default being 0, and for example - coal being 1; coal has higher priority than default.
And more, please search your permission plugin's wiki to find out how to set up weight.