Sanada knew that Hale would never prioritize his own life.
Hence, the unfolding scene at the WAA Main Headquarters was rather absurd, as it would be impossible for such a massive force of agents to band together and defend the head director's office.
The current pre-programmed situation was simply for testing purposes; they still had two more simulation runs in the coming weeks anyway.
The old terrorist leader, however, didn't expect that despite going out of his way to program such a situation to occur, he wouldn't be able to watch the fight he wanted to see the most.
Knowing it would be unwise to wait for the WAA agents to take the fight to their ranks, Shye signaled for Shirley, David, and Maia to charge with him.
Maverick's strategic mind immediately understood his son's plan, quickly giving the order to his spellcaster squadrons to cover their charge.