Don't forget to use your vman for monster materials (and use highest matty pouch on your vman in priority, herculean matty pouch at this time). Some forgettable bonus are: star signs (3 of them give carry cap),...
Stamps
Hover a stamp to see current level and max reachable levels. Green background means the stamp cannot be upgraded anymore because of carry capacity limit. Blue background means that you have enough materials in storage to upgrade to max. Total cost is based on the strategy proposed at the bottom of this page.