I think it was ifish the one who wrote that the root mass volume is equivalent to the plant volume, you should water according plant size, not pot size. I only water until runoff in the final stage, as I know the pot is filled with roots.
In your case you should water not much, in circles a bit far from the stem to promote roots expanding horizontally searching for that humidity. Roots like oxigen, a waterlogged pot just drowns them, this plant doesn’t like wet feet, letting dry enough the pot gives them that oxygen, in your case more convenient with that lack of perlite … 