If you -have- to use interrupts then 2 of them can be level change interrupts.
I keep trying to get you to get sensors working so you can tell if you -need- to use interrupts at all.
Chances are that you don't. Chances are that you could catch the HIGHs a few times in a row as each magnet/gear tooth passes each sensor. But you won't know until you get sensors working and until you know it's probably not a great idea to design the sketch.