All mix is fine, but it is prefertilzed.
I’d just stick with the biobizz light mix, that way you don’t over fertilise your girls.
I like light mix. Super fluffy and light, and the plants enjoy it.
I use coco now though, makes a major difference if you feed every day to run off with coco. I now average 5-6oz per plant with coco. Before coco, I got around 3.5-4oz in soil on my better plants.
If you have time and patience to feed every day, go with coco instead