For a DT, I honesty take my SM masque, mix it with my GVPCB, and then I add some EVOO and some honey, and a little ACV. I leave that in for as long as possible, add heat if possible, then comb and rinse out! (I've even put a bag over it and a sock hat over that and slept on it!)

For a PT, I'll do the gelatin PT, or I'll use ION (same as you) and/or the SM masque, and add some EVCO and a little ACV. (Both of those last two ingredients go into my gelatin PT, too - they are supposed to aid in protein bonding and retention.)
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