I've found the Orchid V4 & V5 to be very servicable with a few minor modifications. They are meant for dual coil use, but to me it was too much trouble with not enough return in flavor, just clouds. The small cost kept my interest, easy to find for under $20, or less if the vendor has a sale running.
What I did was plug one of the air-holes and two of the juice feed channels, coiled it with 30 ga kanthral to 2.0Ω and wicked with rayon. Very simple to build and wick, and it hasn't been gunking or burning the wick even using NET juice.
The bottom fill hole does have an issue with being too close to the chimney to easily refill. I replaced the stock tank with a Kayfun M4 tank, and my syringe slips in no problem, fills in under a minute with no drips or leaks. They work well enough that I now have three of them, and one in vapemail.