Darkrenown > If there is a modifier to concentrated IC, perhaps it could be set that way for an 'optimal' build. Perhaps more than one IC in a region adds a slight efficiency and % bonus to IC. If each consecutive IC added past 5; adds say 1% efficiency to said production line. Perhaps 10 IC in a region can add a flat 20% cap bonus to that region. This would mean that 10 IC regions are worth 12 IC undamaged. This adds a massive boost to concentration and gives you the incentive to defend your industry. It also models 'damage' to industry.
There could also be tech to lighten the load of strategic bombing.
There could also be tech to lighten the load of strategic bombing.