The Aus formation depends on which part of the pitch the play is, and whether it is Ball Possession Opposition or Ball Possession.
In the Defensive Transition ( 10 sec phase of play, or one of the 4 main moments as defined by the KNVB) when we lose the ball in the attacking half the formation usually manifests as a 5-2-3.
If Aus doesn't win the ball back, and the opposition build up progresses to our defensive half/third the formation evolves to a 5-4-1. The 2 wide players drop back into a line with the DMs.
If Aus is building up from the back and progresses into central third the formation becomes a 3-4-3 flat midfield.
If Aus builds up higher again the wing backs often push up to make the shape a 3-2-5, as the wide players overlap.
Most team formations are called whatever their shape in Ball Possession is - so I'm opting for a 3-4-3. Notwithstanding, we've spent a lot of time in BPO in the last few games, hence presenting as 5-2-3 and 5-4-1.