It takes ages for anything but light conditioners to sink into my hair, so this is what I do:

In the evening, co-wash/low-poo, then slather on a thick-ish conditioner, like Shea Moisture conditioners.

In the morning, I rinse my hair under cold water until it's moderately wet, then apply a light conditioner and detangle. Then I apply styling product as usual.

So it's kinda like I'm overnight deep-conditioning every night, just usually with a regular conditioner instead of a deep conditioner.
3a - Fine, thin, non-porous hair - boo!

Shampoo: SM shampoos

Clarifying Shampoo: KC Come Clean

Co-Wash: L'Oreal Cleansing Conditioners, As I Am Co-Wash

Hair Gel: L.A. Looks Sport, KCCC, SM Curling Souffle

DT Conditioner: SM Raw Shea Masque, SM Raw Shea conditioner + coconut oil, GVPCB

LI Conditioner: Tresemme Naturals, KCKT, VO5 shea + SM baby oil

Curl Enhancers: L.A. Looks Beachy Waves, Organix Moroccan Sea Salt Spray. AG re:coil