"Best total strength" is a fairly subjective objective. If you mean to have shields that are able to endure the most damage before falling, your booster mod choice will depend on the type of shield mod you're running (Reinforced, Thermal etc) and how many/what type of SCBs you're running. If you want to find out exactly what configuration will suit your current setup, use http://www.edshipyard.com/ and swap in/out mods to find your best resistance/reinforcing ratio. Example:
If you're not intersted in that kind of complexity, the general rule of thumb is:
Big shield, low SCBs = 2 Resistance Augment and the rest Heavy Duty.
Low shield, big SCBs = 3 Resistance Augment and the rest Heavy Duty.
If you're not intersted in that kind of complexity, the general rule of thumb is:
Big shield, low SCBs = 2 Resistance Augment and the rest Heavy Duty.
Low shield, big SCBs = 3 Resistance Augment and the rest Heavy Duty.