How can I make my baked tortilla chips crispier?
I would try baking them at a lower temperature without the oil some first, to get them partially dried out, before adding the oil and seasoning and crisping them. If the oil's on them the whole time, it'll slowly soak into the chips, instead of staying more on the outside where you want it, and depending on how much you're using, it might also be making it a little harder for water to escape.

The other main option would be to use thinner tortillas, but unless you're making them yourself, that might not be possible!