Generally I like the build, however there are some things I find that are different/additions to your guide. First is that I think Focused Attack deserves an upgrade. It is a fantastic talent that helps in ganking or punishing enemy heroes. For an example look at the damage difference of Zeratul before and after the removal. Also there may be more elaboration on Lunar Flare. Notes would be how you can disrupt melee divers such as Sonya, Thrall, or Diablo as they are diving on friendly heroes. Finally W can be used as a defensive talent especially against a ganking comp. Just make sure to use it on cooldown on routes the enemy team likes to move through.

This really is comprehensive. Look forward to seeing the final product. +1 for now :)