With 3.12 necromancy ascendancy is no longer ideal to build into and glancing blows has been nerfed. However, as the full build (the one showcased with cremation) does not require either, this doesn't really affect the end game setup that much.
With all the new items coming in with Heist I expect that there will be more things to test and the build will probably be improved.
Budget POB (7.2m dps):
https://pastebin.com/2PB1n8Tx
Most recent A8 Sirius (Deathless, 3.5 mins).
Build is no longer budget and damage kinda shows.
https://www.twitch.tv/videos/675113025
A8 Sirius Deathless done! This is my 3rd A8 Sirius kill and my 7th this league, it could be faster mainly because I completely forgot I had Vaal RF (lol).
https://youtu.be/TRwfvVG6K5c
Previous A6 Sirius Deathless, I talk about the build at the end of it:
https://www.twitch.tv/videos/668378487
I'll stream this whenever I can, hop in if you've got questions to ask.
This build is my 2nd build after my 7 year hiatus for POE, the first being:
https://www.pathofexile.com/forum/view-thread/2842985
Activity Checklist So far (scaled up version):
So starting this league I wanted to make a really tanky character that didn't need alot of expensive shit to output decent damage, and with staffs being the main weapon of choice to build a spellcaster around.
So I ended up with this monster of a Scion that has ridiculous levels of defence (this would probably do fine in HC) but at the same time have enough mapping speed and bossing DPS.
I'm only running 1 rare item. I know this is crafting league and all of you are trying to rock mirror tier pieces in every slot but I'm a weirdo and I really like uniques. This makes the build very very accessible as the only difficult piece of gear to attain is the enchant for 1 additional corpse for VD/cremation has 1 extra geyser on Indigon, you don't need it per se, but it functions as as 33% more damage mod, the build still runs fine without it though, add another spell echo to the volatile dead 5 link to summon 12 balls.
There's also no requirement for a 6 link as well for this build. Optimally you'll be using 5 links on both chest and staff.
Estimated budget to get this up and running is 2 Exalts with the majority of the cost being the Omeyocan. You should be able to get a Kintsugi and Pledge without 5 links cheap and use harvest to link/color them easily.
I'm doing t16s reasonably fast, have done all Shaper/Elder map bosses, do all map mods except no/reduced regen and elemental reflect and have done A6 Sirius deathless.
So here is what this build can do for you.
For Defenses:
1. Acrobatics and Phase Acrobatics with Omeyocan and Flasks = 70% attack dodge and 60% spell dodge.
2. Bone offering with Necromancer ascendancy = 57% attack block and 75% spell block (with glancing blows) despite having acrobatics.
3. Kintsugi + Wind dancer = 40% DR if you have not been hit 4 seconds ago.
4. If you have been hit, evasion flask + Kintsugi/Wind dancer bonus = 60% evade chance.
5. 60% uptime of Immortal Call providing 35% physical and spell DR. (it's up about 60% of the time and is bound to left click for autocast.
6. Constantly being at full Mana despite Indigon/Archmage AND Righteous Fire, this gives you 30% DR in the form of Mind over Matter, 40% if you have a clarity watcher's eye. (I don't have one btw)
7. Max res for everything except Chaos (Chaos is at -15% with flasks up).If you balance your res well as I have you'll have all of them at the same value and be able to run Wise Oak.
8. Agnostic ensuring you're always at full hp.
9. Pathfinder ascendency keeping flasks up almost permanently.
10. 3.8k Life, 7.8k Mana.
11. Blind procs on Storm Brand.
12. I plan to either squeeze in Vigilant Strike or Hardened Scars annoints for 20% DR from fortify.
Effective Hit Pool:
For damage:
Just look below. I summon 12 of these babies every 4 seconds (Indigon cycle). It's usually about... 500k damage tooltip because the screenshot below has Vaal RF up.
This is just with EO/RF. I can permanently sustain RF as long as the map doesn't have no/reduced recovery mods.
What surprising about this is that VD scales flat spell damage very well and Archmage adds a whole tonne of it when interacting with Indigon. This allows you a 4 second nuke cycle of 12 homing missles that can shotgun/splash.
The only downside to this skill is that it's absolutely terrible at dealing with boss fights where there are alot of adds. For that I have a 6L Sire of Shards cremation setup with Unleash support which deals with those fights very well.