Roleplaying, doesn't feel right without the purge ;-)
With spies i only went to 60 NU and 70 Neutrality for earlier War Economy. This only gives me One-year draft, after the purge i can get Three-Year draft and as USSR i normally start investing a lot of LS in officers in 1937.
EDIT: Also, HI needs 70 NU
Okay...since I've never thought of using HI this makes sense, though I don't concentrate on officers until late 38. Also, since I am always building NU I get to 70% sometime around October, 1937. Hell, what's another year
I don't go to war until September, 1939, and at this point it's only against minors. Having an officer ratio of 110 is more than enough to fight minors (including Italy) and I just keep building officers up until I've reached 130; this is satisfactory for the big showdown with Germany. I just can't stand the thought of losing all that LS and those officers, especially since Russia doesn't have enough leaders, even without the Purge.
And you gain 500 MP by firing the Purge. I too have looked into this Charles, once i saw how early i could fire War Economy i gave it a look see. I wasnt thinking about the HI but i really didnt want to give up 500 MP, and yes the Third year draft is big for the Soviet Union.
Oliver: I never want for manpower with the SU; in fact they have more than enough without any buffs.
This all comes down to play style and objectives so no particular method is right or wrong. By the time I go against the Germans my airpower is almost double the Luftwaffe and I have more ARM and HARM than the Wehrmacht. Germany is lucky to get more than 3 provinces deep into Russia before I seize the initiative.