Sorry if someone has posted this, I couldn't be bothered reading all the other opinions, but the NAIPS GPS RAIM prediction page says:
The Airservices Australia Receiver Autonomous Integrity Monitoring (RAIM) Prediction Service (RPS) provides predictions of RAIM availability for flight planning purposes only.
Pilots-in-command are reminded that the predictions are based on information received from the GPS Operating Authority.
In flight, pilots-in-command should use the RAIM prediction facility of their GPS equipment for RAIM availability predictions.
Presence of RAIM should be continuously monitored whenever GPS is used for navigation.
So if the people generating the NOTAMS think you should use the in-flight equipment for a prediction in addition to the NOTAM, that's good enough for me.
It also specifically says the RPS is for flight planning purposes only.