Try to time Gnar's Rage transformations to maximize effectiveness from Mega Gnar and Mini Gnar.
Engage in teamfights when you have high Rage bar to ensure you can transform.
League of Legends Gnar players will find him to be a confusing champ to build out properly. You will notice that his build changes when he is up against either generic or highly focused team compositions, showing you shouldn't choose the same Gnar build every game of League of Legends
The most important items to incorporate into your champion's build are: Trinity Force, Sterak's Gage, and Hullbreaker. Those who added these items in their builds had a better winrate than those who went for other builds for Gnar. Likewise, if you are fighting a mixed enemy team comp, you should strongly consider getting Gnar the Precision, and Resolve runes. In recent matches, he won the greatest percentage of his games when equipped with these runes.
We established our Gnar build suggestions by analyzing 22,810 recently ranked LoL games with him in them. We only propose the best winrate Gnar builds that were built by ranked LoL players enough times for us to propose them. With so many rounds in our dataset, we are very confident in our suggested builds.