[Nezha] has several synergies in his base kit that can be used against almost every type of mission. We don't run a subsumed ability here but almost every choice is a good candidate on this build.
Divine Spears is usually the ability chosen to be replaced but it synergizes with [Reaping Chakram] on this build. Remember to replace both at the same time.
[Growing Power] benefits every ability but can be replaced with any other aura depending on the type of content you're running.
Controlled Slide is only used because this is a learner build for most players and his passive is extremely off-putting. Replace it with a regular [Power Drift] or any other exilus mod that fits into the polarity plan.
[Reaping Chakram] can be replaced with other mods or augments if you aren't planning on abusing the Divine Spears synergy.
[Transient Fortitude] can be swapped out with [Blind Rage] if you're confident with your energy economy.
Range doesn't need to be much higher than 100% even with Divine Spears on the build as the chakrams don't propagate efficiently over long distances.
Vitality and/or [Health Conversion] can be swapped for [Rolling Guard] or any mod that fits into the polarity plan if you're going against very high level content.
Arcane [Guardian] probably shouldn't be replaced due to the synergies it has with Warding Halo but if you're running very high level content it can be swapped out with offensive arcanes.