I want to create a logistics mod.

I`ve looked at existing logisctics mods and i want to retain the upkeep penalties but allow for more capitals in the later stages and have a greater unit cap boost for the later stages while retaining the limits of the earlier stages.

My reasoning is that larger economies should have larges benefits.

Also i`m playing with the star wars requiem mod and the ships there have a much greater cap cost.

My question is- what tools do i need to start reworking these aspects of the game? So far i have only found map and effects tools..

Appreciate any help..