Weed smells derive from sulfur and amino acids. If your nute lineup is made for cannabis, you should follow their instructions. The act of reducing nutes and measuring EC is a waste if you don't quantify what those nutes are. If they are products made for the end of bloom; potassium sulfur magnesium aminos, boron etc, you shouldn't reduce them. If it's a bunch of calphos and ammonium nitrate you should.
That's why people are confused about flushing, they act like EC is a single universal fertilizer molecule. Your EC means nothing until you know what's in it.