IMO the very best solution is to have both.
Mister will get your plants wet, and at the same time raise humidity. But you don't want to be soaking your plants to raise humidity.
A fogger or ultrafine mist will provide a constant source of damp air, but this can also saturate the air and lead to getting plants wet, but is a much better source of constant humidity if set on a timer or hygrostat. But, is an inefficient way to apply overhead watering.
So.....
Best solution is to have both - say misting on longer intervals, and controlling humidity with a fogger or ultrafine mist.
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That being said, maintenance-wise, foggers can be a burden and expensive to replace the piezoelectric element. Also, if you put a residential fogger (one you buy at a pharmacy) inside of a tent or tank, it will quickly rust because of the high humidity. Also, algae and residue develops on the element over time, which means you have to clean or replace it. Mine have ever lasted typically 3-6 months, max, and I've tried many from pond foggers to full units. If you can duct it in, that's better but you still have to be cautious about leakage in the tubing (the droplets condense on the duct), and it's going to be ugly.
Misters are much simpler, with the nozzle filters needing to be replaced only every year or so (with my water conditions anyways). So also much lower cost of ownership.
If you go fog, plants can grow really well because of the humidity regulation, but you will probably run out of money or time to keep it up.
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My recommendation:
Have a mist-king, and a body of water in the tank that has an air stone. If you want to get fancy try the fogger but it's probably not going to be worth it in the long run.