Bigger is definitely not better! Miniaturize your nanites so that you can repair and regenerate them twice as fast. This will tie up a great number of your nanites and reduce the maximum amount.

Skill: Nanotech
Command: NANO MINIATURIZATION [OFF]
Known: No
Lessons: 186 Lessons
Ability type: Noncombat utility
Base balance time: 3.00 seconds
Resources required: 3.50M nanites
Nanites are tied up while the ability is in effect.