The level you want to pick is Things You Wouldn't Believe and this is I believe pretty close to the end of the level where you can get it. After a platforming section you'll come across this room with a box right in front of you, and going past it you will see a platform you can grapple across to with a super jump ability with a drone at every corner and some guys on some platforms. You want to immediately grapple across, get the super jump, jump onto the drone that is to your left, and get it to crash onto the platform right behind it as there will be 3 enemies here. You will have to jump off the drone not too long after boarding it otherwise the enemies will just shoot you off of it. It is really easy to do this achievement here, as every attempt I did to just clear this room I always killed all 3 of those guys with the drone doing this exact method.