[quote who="emmagine" reply="4" id="3332910"] Swarm does *not* attack for the other units. It lowers the defense of the other unit. It needs to be offset though. Each adjacent defending unit should reduce the swarm effect by an equal amount. [/quote] Yeah, this is a good idea. Could be hard to implement though. May be easier to just give an equivalent bump to defense for each adjacent friendly unit.
Kias
I am a bit confused here, as I believe the swarm bonus just lowers an opposing units defense. Sure, there is an attack animation, but the units are not actually attacking. Also, the weapon abilities do not trigger the swarm mechanic from what I have seen, which makes for a solid balance.
Alternatively, just keep it super simple and have units stationed in cities cost 0 upkeep. This way, players can station whatever type of unit they want in their cities by developing the military unit and moving it over there without weighing down their economy. If you want to keep it scaling, have city size determine how many defender units it can support (i.e. grant free upkeep on).
This looks very exciting. Can not wait for more details.