Nocturne FF vs Lizard builds

So I play Nocturne alot doing normals when jungling and I've been running the Feral Flare, however I was looking at probuilds and lot of them use Lizard. Any Nocturne mains that could give some input on what you feel like is the best? Also what your build order for items usually is for him?

Thanks!

Also what happened to the Ult buff that was on the PBE?