Early Necronomicon on Enigma

So I was watching some matches the other day in my free time and one game really caught my eye. There was a match I started watching about 10 minutes in and a few seconds after I jumped into the game I took a look at the dire team's Enigma who had Power Treads, a Soul Ring and a Necronomicon Lvl 1. About 5 minutes later he had farmed a Necronomicon Lvl 3. From that point on that Enigma became a teamfighting, lane pushing machine and the radiant team just couldn't stop the guy from farming.

As a guy who has played a lot of Enigma games I was extremely reluctant to this build at first, believing that this Enigma Necro build would essentially be a waste of farm. However, it actually turned the Enigma into a great teamfighting character and the by the 20 minute mark all of the tier 1 and tier 2 radiant towers had been destroyed. 4 of which were because of this Necronomican Lvl 3 wielding Enigma. Soon after the 20 minute mark the Enigma had also farmed a Blink Dagger and a Black King Bar and was fulfilling his support duties well.

So my question to you all is whether this is a feasible build or whether it is just a one shot wonder that would not work against a well coordinated team. Is rushing a Necronomicon Lvl 3 worth delaying a Blink Dagger, Black King Bar and other valuable items for Enigma in the early game?

As a general rule of thumb no, but again, dota item selection is situational, if he had the space to push there's. No reason not too, this asus tip is based on the idea he had an opening and took full advantage of it, more than likely blew up some heroes with the Necro creeps too.
Generally, I would say it's probably a better call to emphasize his standard, initiation oriented items, blink dagger, than of course bkb to ensure his ultimate stands a better chance of remaining uninterupted. I havnt considered that and he's one of my favorite heroes by a long shot.
With the farm you described its pretty obvious to see the benefits, but again I feel as if he made a stellar choice based on his teams standing in the game at the time. I'm by no means one of the most knowledgeable people on this sight, hopefully you get a response from one of the higher tier players.

I agree with Sulaxrox. If you're going for an Early Push Strat, then Necronmicon 1st has a huge impact, but otherwise, it can wait until after Teamfight Items, like Mekansm, Blink Dagger and Black King Bar.

Maybe if you can get it in a reasonable time. But first you obviously have too look if you need any of your other core items like mek, BKB or blink.
But it is just as good as any situational item on him.