I still think the school is better. The earlier we start on it the earlier we can get (presumably) passive necromancer growth as they graduate and teach the next generation in a codified manner. We need more but I wouldn't say the need is pressing in the same way it was when someone was actively about to go to war with us.
I would argue that it is even more pressing than the food. If the peasants do not get their grain dole you get upset people with pitchforks, if one of the necromancers snaps because they are mainlining fear of death too much in their overtime they could cause massive damage both in terms of material and public relations.