I need help understanding what the plant is needin...

Check this bro: Start water to 400 ppm with calmag then feed with others nuts. Is a Ca' deficency, very usual in Cocò with ghe products. Others solution can be increase micro +20% but you have calmag...so use First method. Check run off pH (5.8 is perfect). Check also your K nut (k and mg are LinkedIn, and mg and Ca idem), cause i think your burned tips are not over fert but under fed

what eslse she would have needed , she has it now, she cannibalised herself in the stretch to flowering. there she had a need of N, that she took out of the leaves. now your girl is in flower and may have a bigger need in P and K. i think you can give her the recommended dosage of florabloom. the yellow, brown leaves will not mend again... damage is done and no big problem at all. You can stay with you other fertilisers/ liquids, just rise the amount of florabloom

This plant needs for you to 2 things right now slow up on the watering meaning give it a good dose of water but dont do it everyday your plant is showing signs of over watering . The brown spots look like 2 different things its hard to tell in the picture but 1) looks like septoria , if those spots turn black i would highly recommend you cut those leaves off without waving them around to much those will break open and release spores . Second it could also be PK deficiency , I would try to adjust that and you may see the signs of it slow and stop all together . Either way i would remove those leaves gently so that its not an inviting nesting ground for pests ! Other then that your well on your way to getting some kick ass medicine ! I hope this information helps you ! -Happy Growing!