Hey, you grow looks super healthy, you'd be mad to try add anything to it other than micro enzymes or a fungi with water and with it being living soil there isn't even a need for it. With nute packed soil you get about 4-8 wks of nutes depending if she's a PP/auto. If u look at my TDA I added nutes to it and nearly wrote her off by doing so. Your grow looks super nice, healthy bushy. When you start seeing mobile nute defs (marco nutes) like NPK will get sucked out of old growth to support new growth you'll know then when you need to add nutes. But you don't even need to let it get to that. And for it bring to strong, idk about that. You must not of added any micro enzymes or fungi to help break down nutes? I used 60% high grade compost and then 40% high grade npk cacti plant mix, and never got 1 burnt tip caused I used micro enzymes with every watering.
I tried adding nutes with a 50% compost and rest coco and even that was still too much for nutes. But when using a pre loaded soil you need to mix it with an ineart sub or have top micro enzymes/fungi to help nute uptake.
Good luck.