:o It might be too late or maybe not effective (even though I did some googling and learned a lot from Korean Grim Dawn community in Naver), yet as a preparation for the upcoming expansion, I would like to reveal my combined farming spots in Main Campaign as Ultimate.
Some may wonder why not Crucible? Sure, Crucible fetches a lot of items too. I do that a lot too. Yet you may consider farming Main Campaign certain items quickly (such as Solael Pants). You don’t have to follow every step in my farming style.
I do not recommend do this on Normal (Veteran) and Elite, you may not get fully effective farming, thus bring your best character or an adequate character with high Run speed (You gonna run a lot) in Ultimate.
It can be used from beginners (who just got into Ultimate) to skilled players (It might be no brainer). and lastly it is still RNG based farming, thus you may not get what you wanted.
Here it goes.
Act 1 https://youtu.be/pnZ2bnJoD2U
Devil’s Aquifer - Viloth Ring.
Simply put, from Devil’s Crossing, open a trap door near the riftgate. Don’t bother with lesser enemies such as spiders, Slith and so on. Just rush towards the boss, Viloth. Kill it.
The Reason - solid Ring for Poison/Acid Damage build.
Hidden Path (Dreeg) - Rift Scourge Slicer, Dreeg Pant (most important)
If you have not done Hidden Path at all, I recommend to google its paths.
You may need 2 Dynamites to open its blockage first time. When you clear the blockage, kill every enemy during this path for Rift Scrouge Slicer and your safety (those little poison projectiles can be deadly). You will reach Guardian of Dreeg, kill it with caution, it can be hard.
The Reason - As for Rift Scourge Slicer, a solid weapon for Poison Damage build characters if there are sufficient prefix and suffix. You also need it for making Vasilik Dagger. Dreeg Pants can be useful too.
Warden’s Laboratory - Aether Crystals, Aether Shards, Aether Clusters.
When you come to Warden’s Laboratory Rift, DO NOT HEAD TO THE WARDEN, HEAD BACKWARD! When you move backward, you are going to face several Aether Crystal Clusters, destroy them. 2 things - ignore lesser enemies and beware of Valdrun the Aetherial Nemesis if you have Nemesis reputation from Aetherial. Up to you fight them and Valdrun, but personally, I ignore them and Valdrun, because it can be time-consuming. When you see a shrine, you are done. Head for next spot.
The Reason - Not only crafting some materials, but you may need them to craft Dynamites easily from Black Legion Blacksmiths (Homestead and Fort Ikon).
Act 2https://youtu.be/ExYwVh-vgFk
Spined Cove - Ectoplasm
Go to Arkovian Foothills Riftgate, head east until you see a cave entrance. This is Spined Cove. You gonna see Ghost-type enemies. Kill them all. Seriously, KILL THEM ALL. Because they have a high rate of dropping the precious Ectoplasm.
The Reason - Ectoplasm is hard to come by and you may need to craft important items… such as Skeleton Key.
Cronley’s Hideout - Dynamite, Cronley’s Ring
Go to Cronley’s Hideout Riftgate, you can kill everyone or ignore lesser enemies. However, you may consider doing some checklist on the way.
- Kill Enemy Heroes.
- Destory a junk pile(not sure it is a correct name)
- Kill Money Bag “Martin” (Blue Aura Guy)
- Definite Dynamite Spawn near Cronely.
- Lastly Cronley himself.
first 2 may drop Dynamite, but MoneyBag “Martin” definitely drops Dynamite (or 2 Dynamite) for you. There is Dynamite Spawn near Cronely (to be specific, it is north-east before entering Cronely’s room. If it is a co-op mode, there will be ONLY ONE, in other words, if one of party members pick it up, others cannot pick it up anymore. Lastly Cronely, he cast a barrier similar as Maiven Sphere… which cannot be harmed. Wait until it is gone (10-15 seconds?) or cast Nullification from Arcanist Class. After that, Kill him with ease.
The Reason - You may need at least 1 Dynamite in my Act 3 farming (Check Mountain Deeps) and Cronely Ring can be sweet if there is right suffix and prefix as well.
Arkovian Undercity - Kilrian’s Shattered Soul
Go to BROKEN HILLS RIFTGATE, NOT TWIN FALLS. From Broken Hills Riftgate, run back to Arkovian Undercity (North, there is a ghost NPC at the entrance). Its entrance let you start from the middle of Arkovian Undercity. To save time (or kill everything if you have some time), just run toward the last level of Arkovian Undercity, where Kilrian should be there. Kill it with caution. It can be a pain to kill for certain characters.
The Reason - You may need it for use as a chest component (sweet!) or crafting certain items such as Ulzuin’s Headgear, Scourge and so on.
Hidden Path (2) - Solael Pants and some Chipped Claws.
Go to Broken Hills Riftgate again, run towards 2nd Hidden Path (Google the second Hidden Path map if you don’t know the way around). You may need to kill and get the Runestone from 1st Hidden Path if it is your first time in Hidden Path as Ultimate. On the way to the Hidden Path, there will be a lot of beasts (some boars and Harpies), I recommend to slay them all, because they may drop Chipped Claws. Lastly when you meet Guardian of Solael, kill it with caution, his chaos (looks Chaos to me) attacks can be deadly.
The Reason - Chipped Claws for many crafting… hard to mention them all. Solael Pants… it has few critical resistance such as Aether, Bleeding and so on. Dreeg Pants is good, but I personally hate Bleeding Resistance, which there are no augments to cover Bleeding Resistance yet.
[strike] Smuggler’s Pass (Optional, only if you don’t have Crucible) - Bonecrusher.
If you have Crucible and do a lot of them over 100 waves, you may have a lot of Bone Crushers. Nevertheless if you don’t have Crucible or cannot do over 100 waves yet, you may consider to come to Smuggler’s Pass and slay every Troll (those Big Guys with huge Bludgeon, not Mistborn enemies).
[/strike]
Simply look Secret Merchant in Blood Grove Rift, thanks to mad_lee’s reply.
The Reason - Sometimes you need to craft Mistborn Talisman to craft certain gears (Especially Juggernaut relics). To craft that, you need 1 Bone Crusher.
Mountain Deeps - Treasure Cove, Ikrix medal.
Go to DeadMan’s Gulch and head to Mountain Deep. This dungeon is pretty zig-zag, but if you look carefully, you can find a Treasure Cove easily (I will upload the route image later). Since this dungeon is very dark, I recommend searching for it carefully. When you find a treasure cove, time to use a Dynamite from Cronely’s Hideout. On the way, you may consider slaying Ikrix too.
The Reason - Treasure Cove can drop one of Blood of C’thon/Tainted Brain Matter/Ancient Hearts. You gonna need a lot of them for various purposes. It is much faster to find it than killing a countless number of specific enemies. Ikrix Medal can be sweet depending on suffix and prefix.
Act 3https://youtu.be/X9es-qGSIdM
Den of Lost - Gollus Ring
Go to Rotten Croplands, run towards Royal Hive Entrance (which is random, but it is far North from the Riftgate anyway). Run or slay those bugs (they drop MI swords too… but not my taste) to reach the entrance between First entrance (far west) and last entrance (far east, where the queen bug is there). You will reach Skittering Den and look for a wall that destructible (around center-north) and go through it. You will reach Den of Lost. Far North East, there will be Gollus, kill it.
The Reason - Gollus Ring has good Health and Health Regeneration Bonus. Why not like?
DarkVale Gates (Optional) - Karroz (Blood Signet) Ring
Simply put, If you after only the ring, I recommend that do not bother with enemies for C’thon Seal of Binding, which you can get easily later in Act 4.
The Reason - It has good base stat as Pet Bonus. So if you get the certain prefix and suffix such as Subjugator with Wild, it can be a godsend Ring for Pet build. If you are not into that build, do not bother.
Act 4https://youtu.be/X9KJJuLBOHw
Hidden Path(3) - Bysmiel Pants
Go to AsterKarn Road and go to 3rd Hidden Path (as I comment above, i will upload the image or link it) Dungeon. There will be some enemies that appear, kill them just in case and slay the hound called Guardian of Bysmiel
The Reason - not my fav. but certain build could use it too.
Tomb of Kovaak - C’thon Seal of Binding.
Go to Asterkarn Valley Riftgate, and east from it, there will be an entrance to Tomb of Kovaak with C’thon Humanoids guard it. Kill them and enter there. From start, kill every C’thon Humans until you see Undead enemies (which is near end of the dungeon).
The Reason - You really need a lot of C’thon Seal of Binding for… (sign) too many things. Some may question what about Blood Grove or Darkvale Gate. I tried those before until some Korean guy mentions about Tomb of Kovaak where it is small as Spined Cove with a high density of C’thon enemies.
Bastion of Chaos (Optional) - Obsidian War Clever, Obsidian Bulwark.
Go to Last RiftGate in Necropolis, run North to reach the bridge and bring 40 scraps and some irons if it is the first time. After that, Enter the rift. Inside there, Kill as you see fit about numbers, and turn off the current game session. Yes, you don’t have to use Skeleton Key to go deeper (unless you are confident and need Sharzul’s WorldEater) or look for the exit of that dungeon.
The Reason - Crucible is better for getting both MIs to craft certain gears. Otherwise… you might have no choice.
I apologize for my bad grammar (even though I checked) and less friendly style guide. You may need to google them a lot if it is first time (this is my first guide, I don’t know how to upload images and link 
). Yet it is good way to spend some time and prepare for the expansion.
I hope it is useful for you guys because I only read class build post and I want to repay by this guide. Happy Hunting, and Good luck with RNGesus.
p.s. I uploaded youtube video about them… sorry about my bad Engrish.
