[0.3][build of the week] - Accept the gift of Immortality! - tank everything/one button clear

Base idea is simple

We use Prayers for Rain unique body armour, that have mod Energy Shield Recharge is not interrupted by Damage if Recharge began Recently
Then we force recharge via Reformed Barrier node that force-start ES recharge when your minion is reformed.

Now we have two things left - how to kill your minion and how to reform it quickly.

First part is easy to setup - Infernal Legion III + Feeding Frenzy I + Minion Instability + spectre with fire weakness. There are bunch of those, I used Bloodthief Wasp from act 3 first location.

Second part is.. well.. you stack every minion revive node out there and add Heart of the Well with minion revive faster mod. That give us revive timer of 4.3 seconds and that timer is almost perfect, because..

Because volatility explode after 4 seconds of gaining it. Why it's that important? Because you can't start a recharge that was already active, at least it didn't work for me. So we need to stop it by taking damage just before miniom revive..
And so we use Unstable Bond node that give 3 volatility every time minion die. After 4 second they explode, dealing 300 damage and interrupting ES recharge. 0.3 second later minion revive and recharge kicks back in.
It's immortality built on eternal death/rebirth cycle of suffering of your poor spectre minion. If that isn't Witch Way, then what is? Also wow, volatility is finally useful for something!

On top of that Eternal Life let us turn every %of damage taken bypass energy shield into basically less damage modifier. And, as cherry on top, give effective bleed and poison immunity.

After that it's just a simple job of taking every Maximum Energy Shield node in tree there is. Recharge rate nodes are, in general, useless, since recharge rate can be boosted by other ways, will go bak to it later

For damage I used Doedre's Undoing support with Despair curse. Why? Mostly because it's damage is independent of gem level, so I can go sceptre for spirit and foci for extra ES together. Damage scales with int, so to do big damage you just have to be smart about it. Nothing really innovative there, except good from nothing placement and in general efficient tree.

Oh, and volatility have a side benefit of giving a bit of damage on top of it's main self-hitting use!

If you really want to put something on middle mouse button you can use circle of power on weapon swap. I won't judge.

1)Boosting recharge rate - two main ways are 50% recharge rate runes in chest armour and.. Umbral Well. For those who doesn't know it's ascendancy node of the new kinda secret abyssal lich ascendancy, that transform skeleton minions into passive buffs. And skeletal cleric grants you 30% increased recharge rate. For just 20 spirit per cleric! Just stack away as much as you want, just don't go overboard because..

2)Boosting max hit and/or DPS. Umbrall Well is multipurpose. Each storm mage will give you 25% increased spell damage, while each frost mage - 35% increased maximum energy shield. That way you can balance your recovery/max hit/DPS on the fly basically, re-adjusting between every encounter. Or even during one. Build is tanky enough to take some time reallocating your spirit while wither keep stacking

3)Low Life - there are several bonuses you can get on low life and with "your life can not be changed" lich passive maintaining it would be trivial. Setting it up tho.. yeah, you will need to refund that passive, cast lifetap-supported spell enough times to get low and allocate point again. Good thing you need to do it only after death, so rather not often.

4)Shrine scepter is "free" ~40% one res, that really helps, since we want int on every gear piece and that takes suffix space. But don't go fire res one, since that will slow down your minion self-immolation.

No skill run ultimatum, tested for fun - https://www.youtube.com/watch?v=3EDrb_EO4uQ
150 splinters Xesht - https://www.youtube.com/watch?v=D-Ubfx28gzg
t15 map showcase - https://www.youtube.com/watch?v=HrvUqL4u12Y