Night Stalker Skills and Items ONLY!

I always hate buying a Vanguard on Night Stalker, it's pretty much useless in my opinion: I usually go for Phase Boots, Urn of Shadows, Armlet of Mordiggian (not always) and then Black King Bar and/or Aghanim's Scepter.
Other than that, good guide. You might want to add a point in Crippling Fear instead of that Darkness at level 6: it's preferable to take it at 10, 11 and 16.

For future reference, if your guide consists of just skill build/item list, you can just add Alt-Tab or Build at the end of your title and everyone here will understand that it doesn't consist of any written parts.

In terms of the build itself, it can be improved. You need a point in Crippling Fear, no matter who you're facing or what lane you're in. You get an Armlet and a Vanguard, Night Stalker only needs one, not both items. Also, good alternative luxury items are a Desolater or a Mjollnir.

I think for the sake of the viewer, you should add at least two sections to your guide, one consisting of what lane you go to, and one which list Night Stalker's counter-picks. If not, then please add in the title the lane you go to.

I'll reserve my vote for now, but if you make some appropriate changes, I will come back to this guide and rate it.

Edit: An example title "Mid Night-Stalker (Alt-Tab)"