Lightning Arrow
Lightning Arrow is core to the build as you'd expect, Utilized to quickly combo with our other core skills lightning rods to detonate the rods under large packs of enemies, or otherwise used on it's own to take out weaker packs of mobs. If you get OP Enough you can slot in Nova Projectiles instead of Elemental Armament II and not even need to aim anymore to destroy the whole screen.
Lightning Rod
Lightning Rod is our main combo and our main source of damage for bosses wholesale, each rod fired into the ground is chained to up to 6 times dealing their initial damage once again in what ends up being a large explosive radius with a limit of now only 10 rods in the ground at a time in 0.4. Any chains from sources outside Lightning Arrow will now only cause a maximum of One Detonation per Second, while in 0.4 Lightning Arrow's detonation speed is now also limited making it more likely we'll need to mix things up this league.
During Mapping we'll be chaining Lightning Arrow & Lightning Rod interchangeably as needed based on the threats presented to clear the map with the help of 
Herald of Thunder. During boss fights try your best to keep 10 total lightning rods below the boss and then set them off with Lightning Arrow .
Shockchain Arrow
Shockchain Arrow has been reworked from 0.3. It now no longer releases secondary beams that continue to split. Instead, the initial projectile now consumes Shock to create a Chaining secondary projectile, which creates a Lightning Rod in the ground near its last target after its final chain. With the addition of the Mirage Ascendency, My current theory is we can use this in tandem with Lightning Arrow to potentially clear faster then ever before. But this will require live testing.
Herald of Thunder
Herald of Thunder Is the best supplement to wave clear in the entire game at the moment and this build utilizes it wonderfully, early on it'll only equate to a few extra bolts of lightning but once you level it up and improve it's quality you start to really see the sparks fly as bolts of lightning deploy onto every target cascading across the screen following your Lightning Arrow . On top of that each individual Lightning Rod implanted in the ground counts as an attack and can proc herald of thunder, meaning firing one lightning rod and one lightning arrow at a rare results in them not only taking damage from all of the rods and the lightning arrow but all the procs we had chambered from Herald of Thunder.
Wind Dancer
Wind Dancer Was nerfed significantly as far as the total evasion it grants, but it's still a large increase in survivability and the cooldown is now much faster after the charges are spent. Making this still a worthwhile increase to your Evasion Rating.
Voltaic Mark
Voltaic Mark has been reworked from a hybrid clear/bossing skill gem to just be a bossing skill, Use it on priority targets to build up electrocution and increase the damage they receive upon being electrocuted.
Electrocuting Arrow
Electrocuting Arrow Has received further buffs this league to have a faster rate of fire improving quality of life when mixing it into your bossing rotation, Use this on bosses and priority targets to build up electrocution for a 5 second stun as well as increase the lightning damage they receive.
Barrage
Barrage allows us to play around our abysmal attack speed in the early game by sacrificing some top end damage, this can be used to fire rapid assaults of Lightning Arrow or Lightning Rod onto our targets for bursts of damage, but falls off as you get later in the campaign.
Rhoa Mount
Rhoa Mount cancels 100% of the movement penalty on Lightning Arrow, Lightning Rod, Electrocuting Arrow, and Voltaic Mark, so it greatly improves how quickly you can clear maps, and allows you to speed through the end of the campaign extremely quickly. However If you get stunned while on the Rhoa, you'll become heavy stunned from 3 seconds and have your evasion disabled, making it extremely likely you'll die so don't use it in HC. With the addition of sprint in 0.3 and our potential use of 
Mirage Archer in 0.4 as well as a heavy and deserved nerf to 
Inspiring Ally, I may stop using this.
Quality Priority
We are starting with Herald of Thunder because the extra 2 strikes per proc are the most significant improvement to our clearing capability, followed by Lightning Rod, Voltaic Mark, and Electrocuting Arrow for more Boss DPS. After that you'll likely be able to quality anything you like by then.
Ranger
Deadeye
Gathering Winds power in our ascendency which will force us to play for Deflection more so then before. That all being said, there is new potential to be explored with the new Ascendency options, 
