Alright, so the original statement was "Nocturne does not build Aegis". i consider that to be in the same vein as:
- Leona does not build Kage's Lucky Pick
- Kog'maw does not build Bloodthirster
- Orianna does not build Rod of Ages
These are items that fit within a particular "class" or Role and similar champions do build these items (they aren't just flat-out weak items like Executionar's Calling).
You can find plenty of games where they DO build those items, but i'd argue that in those situations there is some other circumstance that would cause that to happen (Leona got hella fed, Kog'maw is at 5 items, Orianna is in a hard matchup like Kass).
The fact that Aegis appears on those champions more than 2/3 times says that it's probably somewhat less restrictive than that.
In fact, i'd say that "Nocturne does not build BotRK (first/second) unless he's super fed" is a reasonably accurate statement. BotRK is 3200 gold for pure offensive stats. A lot of games will close with the jungler having 8-9k gold.Obviously, when you get it, you'll win a lot. Because you're fed.
It is a super good, awesome item on him. But, BotRK is the "Infinity Edge" of junglers. And, again, Nocturne is optimally played with Shen, who is a tanky person who gives him a huge shield and lets him build more glass cannon.
Also, some of those games had Top Nocturne (Rhux + Kev1n), who "does not build Aegis". Nobounds lost really early (20 min surrender) didn't finish it but he had the components. 1
All of this undermines "Nocturne does not build Aegis". What i said wasn't "Nocturne always builds Aegis and always wins".