Rely on the GS down to minimums, and then adjust according to the lights.
Several countries have mountainous terrain (except yours obviously) and you will find that the GS and PAPIs rarely are matching. This is because the GS has been adjusted so to provide the required OCA/H, 200' for CATI. However they don't have to adjust the PAPIs as they are normally standard 3,75 from minimums and down.