My Gnar Build with which i get very well against nearly every other champ is Botrk, depending on your lane Ninja Tabi or Mercury´s Treads, Deadmans Plate, Spirit Visage, Trinity Force and Guardians Angel. U do aswell much DMG but are also tanky
it really depends on what your team needs. damage gnar tends to be better for mini form and is more splitpush-oriented. tank gnar is better for mega form and is more teamfight-oriented.
Gnar works pretty fine with much attackspeed and some dmg because his W deal magic dmg with every 3rd hit you got a good mix and you shred tanks pretty easily but if turn to mega gnar you won´t be that strong
I prefer to build him with Black Clever and Bork than Full tank
I prefer to build him with Black Clever and Bork than Full tank