Best hot air fryer chips?

I use an ordinary chip pan so I'm not sure if what I do is helpful to someone with a hot air fryer which, I believe, uses minimal cooking oil.

I cut quite chunky chips, parboil them and then deep fry them on a moderate to high heat. They usually come up nice and crispy. I know chips that are deep fried in oil are frowned upon now as being unhealthy but we only have them once a week at most.