BTW mirrord blades + demon machine build with external sorc max enchant is absolutely busted. I played it last ladder and it's way better than even pre nerf es. And it basically didn't get any nerfs this patch except for weaker demons/no free conviction. But it shreds even without conviction.
IMO this build is way better without a bound demon, so there's nothing missed by the patch. Some people go with bigger bows for physical damage, but they're missing the point in my opinion. The crux of the build is maxing out the magic damage, and delivering it as fast and effectively as possible. To that end, fanat can help, but it can't really come without losing magic damage. I've been testing out some other variants before I write something up, but I run 2 defilers with one consumed and absolutely melt everything in sight. I even do it without any pierce sometimes to see how it goes, and I don't really miss it except during the hardest of t5 herald fights.