Multiple Module Arithmetic

[JoeSchmoe]

TLDR; Use multiplicative effects instead of additive effects.

For example, the current maximum power savings is 80%.
Instead if you allowed multiplicative effects, you could save 50% after 1 module, 75% after two modules, 87.5% after 3 modules, 93.75% after 4 modules.

For speed modules this could work the same way,
1 module +50% speed, +70% energy
2 modules +125% speed, +189% energy

Might need a slight re-balancing of the effects afterwards. But I think that would make level 3 modules more in demand.