Well you are not going to get the nitrogen you need in veg by using bloom nutrients period! So there is no way to get enough nitrogen without causing lock-outs of K, Mg, Fe,Mn, Zn, and/or Cu.
I and others generally follow TaNg's all AN pH Perfect Bloom from sprouting to harvest regimen with consistent good results and without N deficiencies or lock-outs. The regimen, which does not include messing with the 1:1 ratio of parts A and B, appears to have earned a good reputation, including simplicity, lack of problems. So I see exceptions to this statement. And aren't single-use nutes, like 1-part MegaCrop, essentially bloom nutes?