migueloliv There are no guidelines for your case, you just need to try.
My suggestion
- Tweak the V/S so that you are happy with the vertical path. Once you have a final setting that will take you to FAF: switch the bird on immediately.
Personally, I never learned to use 0,8 deg FPA, 2,1 or 1,3. Even seeing the arrow does not help focus the brain, I just seem to need -1000 / -700 / -500 / -300 fpm.
Enjoy the aeroplane. Judging by the choice of the question the Borg's got you.