[3.3] Rasgeroth's Valkyrie. Dual Mjölner - Arc, Shock Nova, LL Asc. (Rai/Jug.) Shaper/Red Elder.

Short version? You spin, everything else dies.

You get two Mjölners, use Cyclone to proc them, get low life to increase your damage. Use your Jugg ascendancy to increase your defense and meet the requirements. (STR and Accuracy rating. If you miss half of your attacks, even playing as Atziri with 4 Mjölners won't help.) Raider ascendancy is there to further buff attack speed. (Free frenzy charges and Onslaught, yes please.) Free Endurance charges help deal with the incoming physical damage, and you use a Watcher's Eye to make the build come together.

I really wanted to use two Mjölners, and after a lot of theory crafting, found a way to make it work. This build only works on a Scion, and nothing else. (We will be using Cyclone to trigger the Arcs, and the build doesn't have too many places for rare items to go so, you get 0 accuracy rating from your gear.)

Disclaimer: This is an Energy Shield based build with a lot of required uniques. It will not be cheap, it will never be cheap.

Required Gear:

A WATCHER'S EYE: The most important part of the build. Get one with Vitality = Life Leech.

After that, go for:

Low Life build, duh.

Main weapons, keep in mind that Fortify corruption is extra, helps free a gem socket. Even one seems to be good enough, but if you get two, you will have 100% uptime on Fortify.

Helps with talent efficiency, letting you spec less mana reserve talents. High ES, good Chaos Res to deal with those damn Vaal Constructs.

Lots os ES, stun immunity, and a ton of damage for Arcs. Self-explanatory, really. Besides, having your own Shaper Balls that follow YOUR enemies around is a nice change of pace from the usual.

Completes the build. Sky rockets both your Accuracy Rating and Energy Shield. The corruption is not required. It is very, very recommended though.

Nothing too fancy, the requirement is that this ring must be an Elder item.

Pro's:

• Can deal with almost all map mods, depending on your gear. For example, only mod I'm unable to do at the moment is cannot regen, but it won't be an issue if your elder ring has % Phys. dam. leeched as mana or the Elder affix, Mana gained for each hit enemy hit by attacks. Cannot leech and Elemental Reflect, is ofcourse the obvious things this build can't deal with.
• Fast clearing capabilities, as long as your cyclone touches an enemy, you get to watch as 1-1.5 screen of enemies drop like flies. Yes, you are the fly catcher in this scenario.
• Tanky. Tankier than it looks, at the very least. Endurance charges are good enough to deal with the incoming physical damage, and high ES can deal with anything else. Plus, you have about 400+ ES regen along with your leech, making sure that no damage over time can catch you unaware. If your rare equipment covers the resists, you can always get a Death's Door, making you even more defensive.(Plus it has all the right stats you need on it.)
• Stun immunity, six ways to sunday. You get the ascendancy immunity, along with the immunity from Presence of Chayula, with two negatives almost canceling each other out, but wait! There's more, Cyclone Stun Immunity. (I know it's 3 ways so far. I said you are stun immune, not that I'm good at math.)
• Free Frenzy charges for boss fights. Everything else die too fast for you to spawn a charge or two.
• Vaal Cyclone. Get all the style points you can. Why go towards your enemies if you can force them to come to you?
• You look cool with dual Mjölners going to town on monsters. I know it's a cheap way to increase my list size, but damn do I look cool while clearing maps. Plus, arcs can cover the distance when you need them to. (Tip: Learn to time your Vaal Cyclone in Elder fights, and watch as those eye thingies helplessly try to crawl or shoot towards Shaper. Spoiler alert, they never can.)

Cons:

• Expensive as fuck. There, I said it. The E word. I'm not ashamed.
• No reflect immunity. There is a defensive version down below for that though, you may want to check that out. If you want it, you can get it for some sacrifice in your damage.
• While it can deal with everything, the build doesn't pick up before LVL 68, due to how Scion Ascendancy works. So not the best league starter.
• Energy Shield build, so keep an eye out for Eye of Chayula during leveling. Otherwise it won't be as fun as it should be. A.K.A, not really for for those who have not leveled an ES char before.
• Vaal Cyclone: Same style points, different outcome. You missed "Detonates corpses" on a strongbox and used Vaal Cyclone? You just died in the most stylish way. Want to show off and pull in a bunch of monsters in a bloodlines map? Sure, just know that Flame/Frost/Lightning Bearers already blew you up to smithereens. You said fuck it, bring 'em on! OH NO! 'em are a bunch of Porcupines... You just said hello to their livvl'fwendz.
• Single target damage is not high, it is enough, but not the boss melting level you would see on other Arc Totem or Trap builds. There is a reason why I tried to increase defenses, and this is that. (I.E: Reason I went LL is high regen capabilities with minimal talent requirements.) Though, let's be fair. You can mock any Elder or Shaper Guardian with this build, they won't be getting you low unless you mess up. (Minotaur & Eradicator takes some patience, but you'll get there.)
• Watcher's Eye dependant, so there's still that. Unless GGG lets us leech as spellcasters, THROUGH THE TALENT TREE! Wow, much necessity, such confusion.

Passives:


Bandits:


Pantheon:


Ascendancy:

Current Gear:
Jewels:

Enchantments:

Arc, Shock Nova:

Vaal Cyclone:
Disclaimer: Vaal version of the skill is required in order to properly complete the Elder Phase 2. (As in, the potential for Watcher's Eye drops.)

Mana Reserve:


Movement & Golems:

Since both Mjölners and the ability to wield them are far, far away possibilities, you should be leveling as a run of the mill, self cast Arc build. The build will become self-sufficient by the time you hit LVL 68, so you won't have problems for mapping. (Of course, Reflect Maps will have to wait for the completion of End Game Labyrinth.)

Keep Vaal Cyclone at your secondary weapons, along with Faster Attacks x2 and the Leap Slam. (If you are using Scepters while leveling, Leap Slam can be used.) Use Orb of Storms instead of Cyclone, and Flame Dash instead of Leap Slam if needed. If you are able to use Leap Slam, link your Fortify to it while Cyclone waits it's turn.

For Arc, until you can turn into the monster this build really is, use Added Lightning Damage and Spell Echo along with the required other two gems. (Prioritize Spell Echo when you can.) If you have a Tabula, add Lightning Penetration.

By LVL 20, your build should look like:
https://poeplanner.com/AA0AAE0ADRAAACM7KAOWbj1gQ76AgwlGcbQM6roNfFfJKPq4kxzcjxrr7qcI2CRWSHyDES0snI9GHRT60gDBhFPv_e6Qd-Jgs-KtCdnKRiBZAAAAAAA=
(If you wish, start with spell damage and swap them out for Attack Speed later. I don't think it makes that much of a difference since this is no racing build.)

LVL 40:
https://poeplanner.com/AA0AAGMADRAAAC47KAOWbj1gQ76AgwlGcbQM6roNfFfJKPq4kxzcjxrr7qcI2CRWSHyDES2PRh0U-tIXL2TnVdaApMrTvoqhL5Mnf8bBxewYcLvZEy9vj_rw1UlRLJwAwYRT7_3ukAAAAAAA

LVL 60:
https://poeplanner.com/AA0AALkADRAAAFk7KAOWbj1gQ76AgwlGcbQM6roNfFfJKPq4kxzcjxrr7qcI2CRWSHyDES0snI9GHRT60hcvZOdV1oCkytO-iqEvkyd_xsHF7Bhwu9kTL2-P-vDVSVFsCyL0bRmboffXrJgRDzsN7-tR-80WHxhmnnIPlG9mVLcxjHYy0UVHwGat8RhdPO9o8u-I-TfXz0mxhEhca8Nt0NBfahFQpyvZWxslS67pAvfBJ6kAwYRT7_3ukHfiAAAAAAA=

Starting from LVL 60, save your points. For 68, you should have a total of 9 points waiting patiently on the side. (Since there are multiple side quests that rewards points, it shouldn't be a problem.)

LVL 68:
https://poeplanner.com/AA0AANMADRAAAGbG2BtFjr_BBF8_5FGbWDH7f-M7KAOWbj1gQ4MJRnG0DMrTvoqTJ2wLIvS-gKEv74j5N9fPSbFcim0Z6QJLrhsl2VsRUKcr6roNfFfJKPq4kxzc6-58gxEtLJwy0UVHwGat8RhdPO9o8qcI2CRWSI8aj0YdFPrSZp5yD5RvZlQXL2TnVdaApPfBf8bBxewYj_rQ0F9q8NVJUXC72RMvbyepm6H316yYEQ-ESFxrw207De_rUfvNFh8YtzGMdnvXAMGEU-_97pB34mCz4q0AAAAAAA==

From here, you are ready to spin. Get the rest of the required strength through your rare gear, if unable, remove a few ES nodes to get Might and Devotion.
Rest of the points will go towards damage, all the way.

LVL 80:
https://poeplanner.com/AA0AAOsADRAAAHLG2BtFjr_BBF8_5FGbWDH7f-M7KAOWbj1gQ4MJRnG0DMrTvoqTJ2wLIvS-gKEv74j5N9fPSbFcim0Z6QJLrhsl2VsRUKcr6roNfFfJKPq4kxzc6-58gxEtLJwy0UVHwGat8RhdPO9o8qcI2CRWSI8aj0YdFPrSZp5yD5RvZlQXL2TnVdaApPfBf8bBxewYj_rQ0F9q8NVJUXC72RMvbyepm6H316yYEQ-ESFxrw207De_rUfvNFh8YtzGMdnvXcYXMt9V1sULauUbXfq-NGeAS2V_djN-KAMGEU-_97pB34mCz4q0AAAAAAA==

LVL 92: (The Sane Man's Stopping Point)
https://poeplanner.com/AA0AAQMADRAAAH7G2BtFjr_BBF8_5FGbWDH7f-M7KAOWbj1gQ4MJRnG0DMrTvoqTJ2wLIvS-gKEv74j5N9fPSbFcim0Z6QJLrhsl2VsRUKcr6roNfFfJKPq4kxzc6-58gxEtLJwy0UVHwGat8RhdPO9o8qcI2CRWSI8aj0YdFPrSZp5yD5RvZlQXL2TnVdaApPfBf8bBxewYj_rQ0F9q8NVJUXC72RMvbyepm6H316yYEQ-ESFxrw207De_rUfvNFh8YtzGMdnvXcYXMt9V1sULauUbXfq-NGeAS2V_djN-KGGo5UlgHtYXvUMG0LX3Z_AmqwJqLjPndAMGEU-_97pB34mCz4q0AAAAAAA==

LVL 100:
https://poeplanner.com/AA0AARMADRAAAIbG2BtFjr_BBF8_5FGbWDH7f-M7KAOWbj1gQ4MJRnG0DMrTvoqTJ2wLIvS-gKEv74j5N9fPSbFcim0Z6QJLrhsl2VsRUKcr6roNfFfJKPq4kxzc6-58gxEtLJwy0UVHwGat8RhdPO9o8qcI2CRWSI8aj0YdFPrSZp5yD5RvZlQXL2TnVdaApPfBf8bBxewYj_rQ0F9q8NVJUXC72RMvbyepm6H316yYEQ-ESFxrw207De_rUfvNFh8YtzGMdnvXcYXMt9V1sULauUbXfq-NGeAS2V_djN-KGGpYB7WF71DBtC192fwJqsCai4z53TBbrJcdg3zleC80CjdmLKaQ1gDBhFPv_e6Qd-Jgs-KtAAAAAAA=

Defensive Version that uses 1 Mjölner, but has Reflect Immunity and good avoidance.
https://pastebin.com/ivBcC8j1
Changes:

This version moves around faster, and deals a bit less damage. If you feel physical damage is not the greatest threat, you can swap Prism Guardian with Saffell's Frame. (Keep in mind that you will need to lose Grace, and move around your auras to mix and match them between your HP and your Mana. You will also need a LVL 20 or 21 Blood Magic.)