No such thing in GD. Two reasons: % damage and resistance reduction. Both %dmg and rr need to be stacked and limit your choices. So you gotta limit yourself to usually one, sometimes two and max 3 dmg types.
Lightning can viably go with Spear, Korvaak and Ultos. Tri-elemental or conversion based elemental builds can viably go with Sage and Seru and another devo. Actually many dmg types can viably take 3 T3.
Actually it’s possible to do it on some other damage types, here’s my breakthrough:
Aether, old Binders usually went 3x with Aeon, DG and Spear. You can use Korvaak instead of DG or Aeon, although path is less balanced. Other idea is to go Spear and Rattosh.
Vitality is limited to Rattosh+DG, maybe Rattosh+Abomination but meh.
Chaos is DG+Abomination, you can fit Korvaak probably but Idk if it’s even worth it.
Acid, your usual route is Yugol+Abomination, you can fit Torch too for 3x T3 devotions, especially with fire to acid conversion. Also with chaos to acid, you can use both procs of Abomination.
Fire, usually only Torch. Maybe it’s possible to use Torch, Sage and Amatok though?
Lightning, Spear of Heavens + Ultos. But you can try adding Korvaak as well.
Cold, so many good devotions, I guess with DG you can make it 3x but usually people go for 2 out of 4 cold devos, Ultos, Amatok (low tier), Leviathan and Yugol. With conversion Sage or Amatok are useful as well.
Physical, I agree you can go 3x with ease.
Pierce, Azraaka+Oleron+Unknown Soldier is possible, although people tend to do different maps.
Bleed, Moggy the lone wolf! I have seen builds with Mogdrogen + Oleron or Unknown Soldier.
Pets usually aren’t limited to one damage type and have more flexible routes, so you can go 3x T3 devotions. Like Tree of Life, DG and Ishtak, I am not sure.
But OP, unlike some other RPG games, in Grim Dawn is better to focus on less damage types (single most of the time) instead of rainbow and get as much RR as possible and convert other damages to your main.
well, I am playing this build right now: https://www.grimtools.com/calc/O2GEogqZ
Got me way into ultimate (just playing it there) and up to now died 3 times (is level 91 now)
And I do not even check for the best gear, just take, what I find and match it to the rainbow I have…
I think its a tough build due to the massive LL it has (accidentially…)
What do you say, after you checked it?
upload the char as it is to grimm tools. But you seem to play vit dmg, get rattosch and dying god, maybe also abomination
the one currently played? Sorry to ask, but how can I do this, please point the way to a description if available
the button above the “share” button 
You got no gear in that gt. Gear is the basis of everything.
But skills you chose aren’t known for carrying builds unless in deep endgame. Try something with Ravenous Earth. Also, Blood of Dreeg line is on every occultist, never drop this. Mark of Torment is useful and cheap for every necro.
Nerys beginner guide for oppressor also contain Cabalist version, study it [1.1.1.2-1.1.6.2] Beginner's vitality Ravenous Earth Oppressor with leveling guide
yeah, conversion… I did not yet get to that, neither I ever used augments yet… too much hassle. But I figure, this will change, when I face the Nemesisses on ultimate then.
For the RR, I am not sure I get it. It’s resist reduction, I gather but there are even RRs for any damage type? Didn’t have that on my porch yet…
Soooo much input, me like! Thanky a lot so far!
You mean one RR to rule them all? Look at tip of scales proc and Manticore and Revenant (they do not stack with each other)
yeah, I used Scales a lot, but felt limited…
Its good devo, helps with energy, life steal, etc its very good
I know, it’s THE survivability Devo, loved it for a long time. Actually one my most reliable builds was a conjurer with scales… and almost all other lifesaverprocs ggg
Trust me on this one, check out that Nery guide I linked to above.
yeah, had it roughly checked. I forgot: up to now I only played Occultist + XXX yet. Bloody Pox is just IT!
I did not get around other combinations yet (those without an OCC, that is…), though I’m thinking about Shaman-Nightblade Or Necro-Nightblade a lot recently…
I will surely delve deeper into it though.
Take your time, if things get overwhelming, but don’t wait until you need augments or you will have to research at lot of stuff at once. I’d rather get familiar with them while I play. Augments never worsen anything. You could just go to a quartermaster, slap whatever looks good on your gear and look for upgrades when you meet the next one.
Can’t remember it very well but couldn’t vit also go Rattosh+DG+TD when skipping flat RR? Tho that’s RR you’re skipping.
Fire can go torch + DG + TD if you really want it but nowadays DG is only worth on chaos and some attack builds.
Way before scales RR was a thing one way to deal with the DA meta without DA was 4 tier 3 devos on s&b phys soldier. Tree, Ishtak, Vire, Empyrion.
All of it is true, but I mean so far I only found Physical damage can reach 3 tier 3 devotion with the same damage type as Azrakaa + Empyrion + Vire give damage to physical damage.
Cold - seru, sage, wirpool https://www.grimtools.com/calc/lV70ppvZ
Cold - yougol , sage, wirpool https://www.grimtools.com/calc/vNQ4QQnZ
With 55 devotion points you can fit 3 T3 devotion on any dmg type. The question is - will it worth it. )