FAQs are there for a reason. Still as I'm here, you are mainly using the Devil Buster on a Gladius (the flying swords) over and over again, so they'll be thrown into the window. You can also use Charge Shots on the window if the opportunity arises.
To throw the swords, you can jump and grab them, knock them down with an attack or snatch them to pull them down (last one works well). Just don't start to throw one when others are attacking or when the floor is about to be electrified (during which you stay in the air or on the central platform). If you want to make things easier you can buy Air Hike to increase your air time (helps avoid the electric floor) and move the camera to reduce the number of Gladiuses on screen (enemies are less aggressive when off camera, though they will continue attacks they have started). --- DF: So why can a Marauder roll but a multiplayer Turian can't? Delta1-9: You are fighting female turian husks. You have reach but they have flexibility.