Blood Drive

The found this easiest to get with Bedlam. Either weaken two enemies near each other and use rage...or look out for two weak enemies near one another.

I spent ages trying to get it with Jackson (probably over an hour!) but had no luck but when I tried it with Bedlam I got it within minutes of trying. You can start a match with full rage (which gives you three rage attacks ready to be used) which will help and also use the radar to see if there are enemies grouped together.

It might also be an idea to try it on Capture the Skull missions as enemies usually follow each other closely.

destroy 2 vehicles using either jackson or bedlam's rage ability in a single go, best way is to activate the rage ability while near a large group of other vehicles and then shoot everything you have at them