can i use sensi grow A with a ratio 2-0-0 added to my bloom nutes?

so i need just a little nitrogen during my flowering and i was wondering if i can use my leftover sensi grow. just part A because it only has nitrate nitrogen, manganese, and calcium in it, isnt that about the same as sensi cal, givin i dont need much calcium right now. the ratio is 2-0-0. also is it possible to use A without B? any advice from experienced growers would be nice.thank you

or should i just up my level of connosiuer a and b? to increase nitroegen

ok so update i added the sensi grow it worked great...just part a. the ratio was also 3-0-0-, not 2-0-0