The "preparation" also involves mental and emotional manipulation:
: Ganzo reveals to Avilio that he was the fourth man present the night Avilio’s family was murdered, though he claims he did not fire a shot. 91 Days Episode 11
: Ganzo provides Avilio with the layout of the playhouse. Vincent's room is bulletproof and has no outside doorknob, requiring a key or for someone inside (Nero) to open it. 91 Days Episode 11