Ability Strength mods affect the damage per second of Fire Walker and the explosion damage after it detonates with Blazing Chakram. They also affect Blazing Chakram’s damage and the increased damage enemies take when marked, the base health, armor multiplier, damage absorption multiplier and damage over time of Warding Halo and the damage of Divine Spears. Warding Halo’s health can also be increased with armor mods. Ability Range mods affect the radius of Fire Walker’s explosion after it detonates with Blazing Chakram. They also affect the stagger radius of Warding Halo and the radius of Divine Spears. Ability Duration mods affect the speed buff duration of Fire Walker and the duration its flames persist in the world, the mark duration of Blazing Chakram and the duration of Divine Spears.
So, all things considered, here are some builds you may want to try on your Nezha: