The build is lightning based because Lightning Damage gear mods are the highest of the 3 Elements, and also very easy to scale along with Elemental Damage. Lightning Damage can also shock enemies, therefore allowing us to deal even more damage to them.
All content viable, however, some contents are not recommended as they can still be extremely deadly.
Unlike Barrage, Scourge Arrow won't lock you in place while you fire and you don't need to fully utilise the Point Blank Keystone (standing up close and dangerously) to deal a respectable amount of damage to Endgame Bosses. This build was heavily inspired by Mathil and a major thanks to him for enlightening me with this build.
No nerf on Scourge Arrow. EZ Clap. Tombfist's Attack Speed mod got removed,
Also keep an eye out for Infused Channeling Support, depending on how you've scaled your items, it may help to deal more damage than Added Lightning Damage Suppo
Pros & Cons:
+ Easy and Achievable Items. No League Specific or Legacy Items are needed. All you really need are some Uniques with Life & Elemental Resistances on Rare Gear. No need to stack 10+ Abyss Jewels.
+ Adaptable. You can easily swap out some gear and skills to suit your own play style. e.g Tornado Shot or Lightning Arrow for clearing/mapping.
+ Easy Map Boss Killer. Uber Elder, Shaper and (Shaper/Elder) Guardians are cut and dry, no extra mechanics needed, just need to know their basic mechanics and you'll be fine.
+ 5.6K+ Life. With a bit of investment in gear, you can EASILY achieve a life pool above 5.6K, this build usually ends up around 5.7K to 6.1K of Life.
+ Starter Build Friendly. The template of this build can be a nice starter build for a Temp League, no need to respec or level a new character just to play this build.
+ Beginner Friendly Endgame. Once you get used to the Scourge Arrow mechanics, you can just simply fire away from a safe distance and the Thorn Arrows (from the Spores Pods) does most of the work for you.
- Cannot do REFLECT Maps. You can do Physical Reflect if you don't have Physical Damage on your gear, but Elemental Reflect is a definate NO-GO Zone.
- Cannot do Hall of Grandmasters. Only a few builds are dedicate to doing and farming this map. This build definately isn't one of them.
- Leech Rate. Unlike Barrage where you fire continuously and maintain a level of DPS and Life Leech, Scourge Arrow can't do that, so you can't face tank Endgame content.
Bandits: Alira
(You can choose Kill All too if you want. If can you managed to cap you resistances with gear and don't feel like leveling up to level 92).
Pantheon: [Major: Brine King] [Minor: Abberath]
I don't find these particularly game changing, you can mix and match to see which ones you prefer, these are just the ones I use.
Ascendancy:
Gathering Winds ⇒ Fast and Deadly ⇒ Powerful Precision ⇒ Rupture
Gems Link:
Wrath - Gem Quality has no effect our build. The quality only boosts the radius of the Aura, which has no effect our solo play.
Vaal Haste - Gem Quality has no effect our build. The quality only boosts the radius of the Aura, which has no effect our solo play.
Vaal Grace - Gem Quality has no effect our build. The quality only boosts the radius of the Aura, which has no effect our solo play.
Cast when Damage Taken - Gem Quality has no effect our build. The quality only boosts linked damaging skills, which we have none of.
Summon Ice Golem - The Qualty on this Gem has no effect on your DPS, it would only give your Golem more Life thus sustainability. I personally wouldn't pay extra for quality on this Gem.
Immortal Call - You can have this Gem at Level 1 if you wish. The levels and quality on this Gem has no effect on the duration unless you have Endurance Charges. Since you are a Ranger, Endurance Charges are basically off the table. The Qualtiy on this Gem affects the Cast Speed, and since we use Cast when Damage Taken, Immortal Call gets instantly casted anyway.
Enlighten - Level 3 is where you'd want it. You can try getting a Level 4 if you have too much currency on your hands. Quality on this Gem only affects the Leveling process.
Portal - 20% Quality is where you'd want it for faster casting. Levels have no use on this Gem.
Video:
Deathless Shaper Run:
PoB Link:https://pastebin.com/HWzEFzAV
Example Link:http://www.pathofexile.com/forum/view-thread/2244012