They don’t have a % quota from each assessment day. Some days everyone gets put through for final ok from the bigwigs, other days it’s 50%. All depends on the candidates and how they perform. It’s not rocket science, just do the prep and demonstrate a basic IF scan and rate of improvement in the sim and you’re fine. Hasn’t changed in about 10 years.
Not certain about bases but the regular suspects will be SYD, MEL, then a maybe for BNE and ADL. Haven’t seen direct into CNS for a while but never say never.
Despite the naysayers it’s a great job and the training is second to none.