Re: MoM silencer
I did watch the replay, and I can't say it's high leveled, based on the different cs I saw, and some very debatable item/skill builds.
However, Silencer did play correctly, but the point of MoM was kinda moot ; because of Drum, Force Staff and Kelen's Dagger (can't remember if it were bought before or after MoM), MoM's additional movespeed was virtually useless. As OP said, lifesteal wasn't a useful feature, so he got MoM only for the +100 IAS.
The problem is he got it so late (But after all, who would dare to get MoM on Silencer earlier ?), that he already had at least +50 IAS when he bought MoM. You may say multiplying your DPS by 2.5/1.5 = 1.67x is very cost-effective with MoM, but he could get something already quite good with Hyperstone, and he would never have any problem with focus fire.