[Nezha] can combine his passive with the movement speed bonus from Fire Walker to quickly traverse long tilesets. We subsume an additional movement speed ability to let him do pseudo speedruns.
Infested Mobility is chosen because it boosts both speed bonuses from his passive and Fire Walker. Molt is another good option but requires a lot of casting and isn't as effective in vertical tilesets.
Divine Spears is usually the ability chosen to be replaced as it performs inconsistently against some enemies.
Duration and Efficiency mods can be replaced with additional slide or sprint bonuses but losing them will have a significant impact on your energy economy.
Arcane Consequence is a great parkour bonus but is sometimes difficult to proc. Arcane Agility may be used in content where you can force it to proc.