User blog comment:Dj0z/Dj0z's Assassin Nocturne Guide/@comment-4028522-20120524064715/@comment-5045559-20120524162823

Well there is the Gp10 component of Youmuu, i guess i could build it earlier and delay finishing the item, but really the sooner Youmuu is finished the better it gets... it feels like it's a Rabadon on a caster, basically. The HoG sure gives good thing, but delays the core by 825g, i don't really see at what moment i could afford that (It's 2/3 of zeal or Mercs). The Giant's belt after getting the core items still looks more affordable imho, since earlygame it's rather unlikely that you get killed by just 1 person (counterjungler or during gank), and when they start grouping up it's midgame so you have your cores.

And yeah like you said, this build wants early feed, else it might underperform all game, pretty much like any assassin who scales greatly with items (Talon, Kata, ...).