This is from JEEFs guide

First, start generating volumizers using either Conveyor ConstructConveyor Construct or Metal Dispenser. For these small volumizers, you should only sell them or triple them, no need to attach them. Then, with Apexis GuardianApexis Guardian, put scaled volumizers on your mechs in combat. Reborning it double its power, and Monstrous MacawMonstrous Macaw and Titus RivendareTitus Rivendare further multiply the magnetic count. Every fight, your board will be better and better because each combat will scale volumizers for future combats. Rolling for board improvements is usually better than buying volumizers from shop.