On a scale of 10. I have mixed feelings about him. On one hand, he managed massive armies and that surely takes a good deal of skill given the logistics involved. On the other hand, he generally had a large advantage in manpower, often in resources and equipment and suffered heavier casualties. The Soviet Union of the 7 major industrial powers of WW2 was uniquely capable of accepting heavy losses since 5ey didn’t need to worry about re-elections and they had the necessary population.