Sensors and CB

I've just read in the help files (included with the game, accessible from the Help menu) that if you have both CB towers and sensor towers, the CB will take precedence when it comes to targetting - so your artillery/missiles will shoot at enemy artillery/missiles first, before attacking other targets.

I'm not sure what happens in the case of a wide spectrum sensor, I assume that as it has CB functionality that the CB will still take precedence.

Anyway, this is a great reason to build CB towers early in the game - so your arty will attack enemy arty first and thus survive longer to attack other targets later.

I also read that your droids have an initial in-built sensor range of just 8 tiles (before upgrades). Even a basic mortar weapon on a droid has an initial range of 18 tiles. So if you assign indirect fire droids to a sensor (tower or droid) then they get to use much more of their weapon range, making them way more effective.