In my opinion, a leave-in is very important, and even more so for low porosity hair. IT will act as your sealer, more than anything else.
I'm just curious, why is washing every day not negotiable for you? Do you have an oily scalp?
2C/ Coarse/ Normal porosity/ SW Florida/ Transitioning to gray
Cleanse: CJ Daily Fix, JC Cleansing Cream, TJ Tea Tree Condish
Condish: JC Too Shea, CJ Curl Rehab (both as RO & LI)
Stylers: UFD CM, CJ PP, JC Spiralicious, Darcy's Cream Gel & Cocoa bean whip