This is [Wukong] is designed for steel path and is designed to have no Melee weapon equipped while I know melee weapons outshines ranged weapons in terms of damage I saw this as a challenge to see if there was a way for ranged weapons to compete and I do believe this build does that.
your primary should must be a condition applying weapon as a primary ideally Probocis Cernos this is the weapon your celestial twin will be using.
Damage output comes from your secondary weapon a Sporelacer as it has unlimited ammo and 100% crit chance. Elements should be changed on the secondary to be efficient against whatever foe you might encounter on steel path.
The idea with this build is to use your celestial twin to weaken and if you are using [Proboscis Cernos] gather your enemies while your secondary weapon finishes them off. I set Xatas whisper as Helminth as it is the only way for this build to counter sentinels efficiently, but if you don't face sentinels feel free to use roar instead.