Not much of a guide, but due to request this is our official design doc for the resource distribution changes done a while ago. It will also help you understand when and how much MP you receive. Keep in mind, payback is not calculated (the speed of resources you receive, when losing a unit).

Cumulative is the amount of max resources you have available during given time.



The standard payback for Assault Zones/Combat is 1.25 MP per second. That means you receive 1.25 MP every second for the lost units until the lost amount of resources is regained. Payback stops once you reach the current max resource limit. The payback range is indicated by dark green color on your resource bar.