Unless youre running something like
athena you ec is way too high for veg imo, im on the conservative side when feeding but I rarely get above 1.3 Ec for veg, i dont see any benefit of pushing your plants that hard. I also keep my ph for veg around 5.8-5.9, i get it up to around 6.2 for flower, building up a little daily.
With that high ec in your runoff i would probably say you need to pay attention that your runoff is adequate every feeding, and ensure proper ph is consistent. Iirc you want your runoff within +/- 300ppm.
Here is my feed chart i go by, i got it out of a book and if you watch your ph and get good runoff you shouldnt have a problem. I start on the low end for each phase, and if they ask for more i bump up the ec by about .1 or .2. Im no expert in coco so take this with a grain of salt. Ive never had a deficiency or toxicity in coco, or even a sad leaf.