Pouring recommended dosage of PH perfect Grow, Bloom, Micro without diluting till desired ppm is just wrong. It will make EC about 2.5. This is the fastest way to poison your plants with excess of N and buying a new set of bottles. Grow component in PH perfect GBM is actually Potassium, not Nitrogen, so you need it for flowering anyways.
For the most part of flowering I would simply adjust all three components by NPK values to get flowering NPK, using as much Micro as possible (although it’s the main N part).
As we speak about 6th week of flowering, you can just add twice less or as little as possible Micro, normal amount of Grow, Bloom, and add BigBud, then anyways dilute till desired ppm. Budcandy is rich on magnesium, rising ppm as well, so don’t just add this supplement without checking ppm.