I wouldn't do the resistance checks on the cable assuming eol. If DP then its seconds.
Id agree it shouldn't take an hour 30 mins for 8 or so circuits.
Do you do the paperwork check and the walktest on the same walk around or separate walks?
I have sensors around my house too, I do like to have them.
Im using HKC wireless PIR Cams with pet lenses in. I do get the odd false alarm but as i can take a picture via the app i dont worry.
However these are internal devices i fitted them externally to test.