do you create emergency nucs (larvae brood) or hopelessly nucs(emerging brood only) ?
actually newly emerging bees accept the Q , nurses have already been exposed to old Q and her brood pheromones and if ve the chance(larvae brood) priority is make their own so you ve to wait brood sealed and cut any emergency Qcells and sometimes need also(so as do no supercedure after) one more larvae comb to be added after and do the same(wait and cut) and then introduce new one making nurses definetely hopelessly ,personal when i ve to do this i also prefer do no put much stores in the nuc until acceptance so as do no incourage nurses(''fasting and desperate'') , its kinda ''false'' that with nurses are those accept new Q when nurses ll do the most can do to reign their genes and nurses are those bees who will protect their brood their Q and that is what you want to happen when unite colonies , its different and confuse
when make nucs want to rise their own cells then yes population need to be much and mostly nurses also store combs need to be plenty but when make nucs to introduce them new Q and more a post Q(completely foreign pheromone) then need emerging brood > bees and as old enouf to emerge as soon possible