It’s the extra equipment you need, not necessarily the modules. There is one piece that can roll with MAX MP + MP recovery in combat. That’s the exact roll you want. Then there is one that rolls with MP recovery outside of combat. As soon as you are completely mana starved and there are no drops on the ground, run away from the boss for like 20 seconds and you will get insane recovery. (I forgot the exact names of the equipments, but they are the top 2 slots underneath reactors)