You either kill one pak which is -320mp or you drive your opponent of the field and park a kv1 in their base. that gives you enough time to get a second kv1 and make it very hard for the axis player to field a counter. Add cons, guards and il2 planes to the pushes, probably dealing with a second pak and you have a 20min gg 90% of the time.
I think multiple kv1s can be a problem, atleast in 1v1
I've really come to respect miragefla a lot over the past few months. He really tries to get a lot of testing done asking a lot of people for help and a lot of trial and error and refinements with so many mod games played.