The rankings.. are very well complex..

Elemental god/leader: Leads everything.
Everyone must answer to me.
The lords, there will be 4, will be in charge of the seperate elements, everyone under lord rank must listen to the lord, etc.

Fire lord: (leads all the fire peoples)
Brushfire general
Fiery captain
Sparking soldiers

Water Lord: (leads all the water peoples)
Tsumami general
Cerulean captain
Flowing soldiers

Air Lord: Zack Reikasu
Hurricaine general
Typhoon captain
Breeze soldiers

Earth Lord: (Leads the earth people)
Mountain general
Boulder captain
Rock soldiers