If you just think of a submission just as an attack then you’ll have a very difficult time submitting good people. The truth is that in order to submit skilled grapplers you first have to be able to control them in that position, which means thinking about and training submissions as positions. Here, from the new instructional BJJ Games (https://www.grapplearts.com/bjjgames) is the armbar control game which will teach you how to control the armbar as a position. Live training footage starts at approx 4:21