You're plants look like thier doing really well, I'm also doing a Mephisto genetics strain - Auto S.O.D.K . I've defoliated it and it's doing pretty well tbf. Its pre flowering/ pre flower stretching. Happy growing
Looks like the plant is hungry if TDS is only 210 still and the color of the plants.
May want to get some extra calmag added because you are growing in coco.