in that case , yes, radial for every thing.
if for example you have 2 pisrs back to back (say front and back room) then you can use an 8 core and loop from one to the other for powere and tamper, the spare pair you use for the cct pair.
but idealy you run a cable for each.
the controls should have enough ccts for all devices.
it makes life much easier.
you are allowed to double up on doors i.e in series, but its not really worth it.
remember the less you have the less trouble there will be, and obviously fit an fcu for the supply