I run this build for T13 speed runs and bounties and it's surprisingly just as fast as my chicken build with Arachyr. I run a variation of this build for GR90+ groups as well with no augments and under 800 paragon. With some tweaks you can adjust the runes and passives for GR pushing. "Speed" builds in general have little to no defensives. For a GR push build you will need more defensives.
How to Play:
The first thing you want to do is get your 10 stacks from Soul Harvest to proc your damage reduction from your bracers. After that, you just kill things. There's really no rotation. You just use the other skills for more speed but I'm sure you'll figure out a decent rotation that works for you.
Zombie Dogs are for more damage reduction. You can either go with Life Link or Leeching Beasts. Both work fine. Zombie Dogs proc your Mojo as well.
Enjoy this build! It took me a ton of farming to get certain pieces in Ancient. That's probably the only challenging thing about LoN builds. It's not a "beginner" or "starter" set because the pieces required have to be Ancient unless you just have lucky RNG. You won't see this build perform well until you have at least 8 ancients equipped but once you do, it's pretty amazing.