Nocturn is a fun ad assassin that you play from the jg who can be built full ad for huge dmg burst, full crit for womp u right in the face, and jsut plain old attack speed that makes you shred people lik they are cheese. Fizz can get ungodly fed and literally destroy people while juking half their stuff. Noc has mroe build options and is generally a nice pick (also less toxic of a champ), while fizz is slightly concentrated on builds but does imazing if ahead. Also ftr, fizz can always comeback no matter how far behind you are if you play sart and farm till lich bane and another ap item, usually.