Mix sounds a lot like mine, mostly soil plus perlite and some claytron.
I used to use vermiculite, but here it's very wet, don't need more water retention.
I put those coco fiber mats at the bottom of my pots.
Not coco coir, but the matting used for hanging plants.
And so when I water and the run off goes through to the pan,
but then over the next few minutes it gets sucked back up wick style.
Though... sometimes this seems to keep the bottom too dry,
as the roots don't come through to the bottom that much.
Still working on this. My pots have big slits at the bottom,
kind of pseudo-air-pots, but if I don't put the coco mat,
I'm afraid the soil will just wash out or fall out through the slits.