My best tip for air fryers is to use them for the second fry of foods that are double fried. Egg Rolls, Karage, Orange chicken, etc, honestly, The double fry method isn’t just for Asian food, it takes anything where crispiness is desirable to the next level.
Do the first low fry as normal, then use the air fryer for the second high-temp fry. You don’t have to worry about overcrowding as much, plus everything will be less greasy. The whole point of the second fry is to remove moisture and the air does this just as well as the grease.