What was the best strategy the USSR could have chosen OTL to get the 'easiest' victory (in terms of least number of Soviet people lost in the war and mitigating the general destruction to the USSR) against Nazi Germany while avoiding war with the UK and France? The date of POD is anytime late 1930s and after with the onset of OTL war for Poland.
For example, what if the USSR does not agree to the MR Pact. Does not give resources to Germany. And assuming if Hitler still invades Poland perhaps the USSR takes Romania in the interim for the oil. Basically, what a hypercompetent USSR might do differently to achieve a quick victory late 30s on.