I use sulfates once every 2-3 weeks to clarify. The rest of the time I use SM, but sometimes I will use a "stronger" low-poo, and sometimes I will co-wash.
Sulfates and even cones are "evil", lol! It's the cycle of constant use of them. If you are only using a gentle sulfate poo 2-3 times a week, you're probably fine!
I just sort of go by what my hair "wants" on any given day. I do lots of PT's and DT's, too!
If it works for you - do it!
2c/3a/3b, Fine/med, Dense, high porous, & normal elas.
Lo-poo - Renpure Keratin, SMR, Giovanni SaS
clarifying - mix Johnson's H2T with low poo
Co-wash - Suave Nats. clar. or coco.
RO - GVPCB, Ion Eff. Care, TN.
LI - SMR, Cure Care, or RO
Seal - MO or Jojoba
DT - + honey, ACV, & EVOO to SM masque & GVPCB
PT - Gelatin!, CNPF
Styling - FSG, AIF, BRHG, LALS/PS, GF curl spray gel, SM Souffle/Smoothie, LOOB
Oils - MO!, EVOO, jojoba, GSO, SM Elixer, EVCO, VO5 Hairdressing