4 chainsaws makes 1000 dps
1 Screamer makes 1750 dps
dps is the only reason.
If you have more damage per shot it will make too much overkill against bomb drones.
Because It is not every time possible to avoid the waste with chainsaws in front of your screamer - so far at the front, that they have more "range" than the screamer while a single missle has to be more expensive, because they kill brawler/blackdawn with 1 shot instead of 2.
It would take less time too, so that another player could notice his 3 or more brawlers to be shot down and lose 2 or 3 instead of 1 if he retreat.
If we double the dps, we need to make a missle cost 2*125 metal instead of 1*90 - also because it would make 3500 damage and only 100 damage less than the max. capacity of Aegis. That would let them penetrate shields.
Screamer needs to be one of:
* AA-arty : kills cheap stuff all over the map ( 200 to 400 dps, no AOE, 10 metal/shot, 25% more range )
* Long-range Anty-Heavy : ( 1 shot each 2 seonds, 4 times dps, 400 metal for the missle, fire only at >300 metal targets.
* * make it possible for chainsaws to fire first at some small targets - reduce the range, or only attack if enemies come closer than 1/2 range and keep fire until no enemy is anywhere in it's range - manual fire at one unit don't lead to auto-cleaning area.
* Riot-AA : really huge AOE, only fires if there are more than X targets where X is toogleable between 5, 7, 9
* * let the missle explode AOE-radius*0.75 above the top of the target to NOT damage ground units, or add an example to the no special damage rule.