TL;DR
Stationary long-range enemy that does area-effect damage to flying robots.What ?
Bombardier would spawn near enemy structures approximately when flying robots become available in the late game. This enemy would do lingering area-of-effect damage to flying robots.Small Bombardier: ~2x laser turret range scale. Would shoot fast enough to target nearby flying robots and prevent/delay structure airdrops.
Medium Bombardier: ~ radar range scale. Would shoot too slowly to be effective in direct combat, but would do area of effect damage that would threaten dense robots clusters.
Larger Bombardier: ~artillery range scale. Similar to medium bombardier.
Damage, range, etc. would be subject to balance considerations.