[Q]

This sector damage ability seems indeed very interesting, but I don't know if mines are the right vehicles for it. In my opinion it is very strange to have weapons that are more dangerous for your allies and yourself than for your enemies who can sweep the mines. But what if you put them on satellites or make a component for bases?
As Geoschmo pointed out the damage has to be quite low otherwise you could end up with a undefeatable defense for a sector.