I DT every week usually, but sometimes I'll do it twice a week. I love to use protein treatments as my DT: I usually use Redken Deep Fuel, but since I'm trying to go cone-free I have been using Biolage Cera-Repair Fortetherapie tubes.
4a/b, a little 3c at the crown; current faves: Anita Grant, Qhemet, Oyin...natural since 2000...(currently 15 inches)