SHARDS: 3 Tauforged Strength, 1 Tauforged Violet Energy/Health orb, 1 Tauforged Cast Speed

Hello, this is a maximum investment [Xaku] with little room for change in the build. This is not a new player build. It is designed for all levels in the game and is extremely effective at level cap content. This build was taken to level cap (9999) on steel path void cascade on several occasions with 0 deaths/downs. Honestly [Xaku] is so stupidly good at level cap it's not even fair.

PLAYSTYLE: Press 4, press 2, press 1, press 3. Aaand thats it. Refresh your guns every several hundred levels or so and eventually around level 1200 you don't even need to armor strip. At level cap you deal several million per shot. Ophanim makes for a nice croud control (which is of little help when they're all dead) and armor strip which can help for those first few hundred levels. To shield gate, you can cast either your 1 or your 4, they both work quite well, this is a shield gate setup. The dodge chance from your 4th is also a nice boon to this playstyle.

ENERGY ECONOMY:
The Violet shard makes for good energy returns, especially with a companion using [Synth Deconstruct]. Arcane Energize is also there to give a huge boost to energy. You shouldn't have any problems since his abilities need to be recast once every eternity. [Archon Stretch] is also there since if we mod our companion for electric damage they can trigger it.

ALTERNATE OPTIONS:
[Archon Stretch] can be replaced by normal [Stretch], and you could use the normal variants of [Primed Continuity] and [Primed Flow]. Archon Shards are unfortunately mandatory since [Xaku] needs a lot of many different stats. You could use normal shard variants instead of Tauforged, however.