The build is pretty much has already been discussed.

Here is just my way of doing it without dissolution of flesh for farming void valdos and other uber hard content.

Level 100 Animate Guardian of Smiting Gladiator [3.28]

Feel free to ask anything.

Quick demo:

https://reddit.com/link/1skkizi/video/lnvze2mzz0vg1/player

Edit:

About transfusion and multiple minions: they would get max soul eater stacks, just not instantly as if we had only 1 minion. For normal mapping they are good even without prestacking, but for hard valdo's, i'm using lifetap imbuied automation to do the trick (it makes CF cost like 6k life and this would make all minion to have max stacks of soul eater in ~4.5 secs). After getting to max stacks i switch back to lvl 21 automation

Another edit:

About AG of Smiting imbuing: even if using feeding frenzy on spectres and pulverise on AG itself would give more paper dps - it is a lot better to use feeding frenzy on AG, because it would cancel "defensive" behavior and AG would be a lot less stuck.

Budget suggestions (from comment):

1. You absolutely don't need accel + massive belt (massive + greater anything would be even more HP). I just had that one and it's like the great QoL.

2. You can use ~1200 life kaom's heart (that would cut the costs a lot)

3. The only thing i would not cut is 100% adorned, cuz it would get a lot harder to itemize without 2% max fire res * 2.

4. About 1 passive voices: you can skip recovery mastery (and it's passives) and get 5% increased max life passive for freed 1 passive.

5. Fortitude (fortify) forbidden jewels: too good to not use them (and kinda needed for AG to not die without Hallowed Monarch). You can replace some 7% life + 10% ele res jewels and get some more res on boots instead of life regeneration to not allocate distant jewel sockets.

6. For amulet you can go without minimum endurance charges and get Perfect Warlord instead of Forest Warrior. You will lose onslaught on bosses (it's up while mapping, cuz of AG boots) and culling strike. But can drop vitality for precision to compensate (but it would be less reliable for watcher's eye).