Good stuff. I only take cover when an invader is present if I'm holding motes, usually because there was a blocker or two on the vault that everyone ignored. One more..... Rule 8: If you're facing hive or vex, shoot the shriekers and hydras first, same goes for cabal, take out the machine turrets first. It helps the whole team. Especially when the hydras can jump around at will and those torch hammer shots are lethal.