You may want to consider the Advken Gorge RDA. The Gorge does well flavor wise in either full air or near full closed.
I have mine drawn down to roughly 2 mm holes on either side. For me that enjoys a restricted direct lung, it does well. It opens to about what seems a 6-8 mm slit on either side. You get on one side the same as the other side, there's no independent adjusting.
The Gorge can be used as a regular dripping RDA or as a bottom feed/squonk dripping RDA. I've liked using it for a squonker well. All in I've enjoyed the Gorge and eventually will buy another, that is if I can quit recommending them so someone can stock them.
And no, I do not work for Advken or anyone in the industry.
Here are some pics to help decision making.