Trigger + Ancestor + Sub-Attack + 10 standard slots
Trigger costs no capacity. Matching slot polarity to the mod's halves the cost. A maxed sub-module adds +10 capacity (+15 if its slot polarity matches).
Base 70. Sub-module adds capacity scaled by its level (+10 max, +15 if its slot polarity matches). Matching slot polarity halves a mod's capacity cost.