I think you just have to listen to your hair. You can do that if you want to.

Most people cowash and then will use a lo-poo when they feel like they're getting too much build up.

I don't think there's anything wrong with lopooing and then cowashing.
Holy Grails:
Cowash: DevaCurl No Poo or As I Am Coconut Wash
Conditioner: Giovanni Tea Tree Tingle
Leave-in: Paul Mitchell the Conditioner
Styling Products: EcoStyler Olive Oil Gel
Oils: Coconut oil. Carol's Daughter Hair Balm.
Deep Conditioner: Shea Moisture African Black Soap Purification Masque (also a great detangler and cleanser)