Maneuvers
From Startroid
Maneuvers give you a way to fight effectively even if you don't have any powers to help you, and a reason to keep moving on the battlefield to find a good position.
Crossfire
If you attack an enemy who is threatened by one of your allies with a ranged weapon from a 90 degree angle to your line of fire, this is called crossfire and gives you a +1 bonus to CM.
High Ground
If you attack an enemy from an elevated position, you get a +1 bonus to CM.
Exposed Attacker
If you attack an enemy who is above you but exposed (because they are flying or hovering, for example), you get a +1 bonus to CM.
Mixup
If you attack an enemy who is threatened by one of your allies with a melee weapon, this is called mixup and gives you a +1 bonus to CM.