Pot in pot semihydro?

[Grim Tuesday]

I am a total beginner, and have been reading about semi-hydro and am thinking that I would like to try it out for plants that seem suited to it (i.e. as far as I can tell, intermediate or cool growing, generally moisture loving plants). I live in the northeast USA and have a furnace on in the winter and air conditioning in the summer. In a word, it is dry. I have successfully been growing Phalaenopsis for a few years and I bought some more interesting and complex plants a few months ago (miltoniopsis nakamoto, dendrobium tobanese, and after congratulating myself on keeping them alive and growing for at least six months, last week I bought an assortment of seedlings from LA Orchid Connection and Olympic Orchids, which I am now waiting for the weather to permit shipping and delivery). My plants are currently growing on windowsills supplemented by LED shoplights (Monios). I want to try semi-hydro, especially for the plants that seem they will like it and are further away from the sink.

But I want to be careful about my low humidity. I read the whole thread on humidity trays, so they seem out. But what about hyper local humidity? I see the standard method of semi-hydro is the pot with two holes on the side. But does anyone use a pot-in-pot method where the inner pot is a LECA filled standard orchid pot with holes in the bottom, and the external pot is a 16 oz takeout container (at least for 2"- 4" inner pots)? Water would be filled up to a line in the outer pot and the holes in the inner pot should allow the water to reach up to the same level in the inner as outer. Theoretically the local evaporation of water from the external reservoir area should cause some higher humidity and perhaps influence the overall evaporation of water and the dry line location, especially if the top of the inner pot is below the height of the outer pot. It could also theoretically allow for longer time between flushing, as there is a larger water reservoir to absorb water from and would take longer to become concentrated with waste products. It would also allow me to test different reservoir levels for my house and see where the dry line falls in different seasons.

Other than "has anyone tried this before and can steer me as to if it's a good or bad idea" I have a few specific questions:

- I am imagining watering would take place by removing the external reservoir, dumping it, then refilling it up to a line and putting the internal pot back in. This removes almost all the old water, like the standard method, so I don't think it is just "topping up". But it doesn't quite flush the upper layers like the standard method does by filling to the top and draining down. Is this Super Bad or Probably OK?

- Is humidity mostly important to the root zone (and particularly the dry line in semi-hydro) or is it mostly a leaf thing? If it's for the leaves, then this probably won't change anything. But if it's about the roots and the dry line then this seems like it could move the needle.

- With a pot-in-pot method like this would slitted pots be better or just regular plastic pots with holes on the bottom?