In Arknights, Sanity is the resource you spend to clear stages and farm materials for your operators. You can spend sanity on charging drones but avoid that, it’s better to just wait. For beginner doctors that maybe struggle to get these last pulls to guarantee a limited operator, or for veteran doctors that sit on piles of LMD and materials – there is a way to get more pulls by indirectly converting Sanity into pulls. If you want to learn how – read on.
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DISCLAIMER:
Orundum farming is an end-game activity advisable only to well built accounts or for anyone determined to get these extra pulls. It is very Sanity inefficient and should be used as a last resort when missing pulls to get wanted operator or when you really don’t need any materials. Also there is an easier way to get more pulls and that is by using LootBar.
Do you really need these extra pulls?
Arknights is one of the most generous gacha games out there. What is so special about it?
- A 6-star operator costs 35 pulls on average (2% chance, soft pity at 50, hard pity at 99).
- As a free-to-play you get between 50 and 90 pulls per month depending on ongoing events.
- Operator potentials rarely matter, so most often you will be content with just one copy of any operator.
- Sooner or later you can buy every standard 6-star operator from Certificate Store.
There is a spark mechanic in Arknights gacha system:
- 120 pulls on collab banner guarantees a 6-star rate-up operator
- First 6-star after 150 pulls on debuting standard 6-star operator banner will be rate-up
- 300 pulls on limited banner guarantees a 6-star rate-up limited operator
- Missed limited non-collab operators can be bought with 300 or 200 Headhunting Data Contracts obtained after spending 300 or 200 pulls respectively, depending on the limited operator’s release date.
- There are plethora of welfare (free) 6-star and 5-star operators which come with all their potentials.
- Many operators and their potentials can be obtained by farming Purchase Certificates.
- Pity carries over from banner to banner with the exception of limited and collab banners. Kernel banners share their own pity
- There is Recruitment where you can roll for operators many times per day from growing pool of 3-6 star operators
- Day 1 players, if played regularly, often will be close to owning every operator in the game.
I tell you all this because building your operators is very important and you should primarly spend your Sanity on event stages farming for materials and clearing out event shops. But if you still want to pull more operators even though Arknights is giving already so much for free, then read on because we will get into nitty-gritty of Orundum farming.
Base setup and requirements
You need Trading Post lvl 3 to unlock ability to collect Originium Orders.
You also need lvl 3 Factory to turn Orirock Cubes into Originium Shards
Base Teams
The best team to put in Factory for producing Originium Shards is Chestnut E1 (45%), and two of the following: Eyjafjalla E0 or higher, Earthspirit E1, Lava E1, Ceylon E2 (35%). This team will give the factory 115% efficiency boost to Originium Shard production. You can also use Midnight E1 or Mint E1 for 30% boost.
For Trading Post efficiency boost the best you can do is to use some of the base meta teams. You can refer to Arknights Base Combo Guide spreadsheet (link in the sources section). Here are some examples:
Shamare E2 + one of the following: Bibeak E2, Kafka E2, Paprika E2 or Diamante E2 + any operator. 138.21% efficiency boost.
Jaye E0, Texas E0 or higher, Lappland E2. In ideal world if you collect all the orders as they are ready you can get 121% boost. Average over 12 hours would be closer to 105%.
Morgan E2, Siege, Vina Victoria E2. +115% efficiency boost.
Where to farm Orirock Cubes
In order to produce Originium Shards in Factory you will need a lot of Orirock Cubes. Stage 1-7: The Tyrant is the most efficient at that, giving 1 Orirock Cube for ~4.822 Sanity spent.
This stage is very easy and you can use it to farm operators’ trust as well. Use 12 operators even if they are not built at all as long as they can clear it on auto-deploy, or put one invested operator that can solo the stage and 11 others that need more trust.
Assumptions and considerations
All following calculations assume that you spend all your Sanity on 1-7. LMD costs can be covered by base production if you use proper base setup and rotate your operators somewhat efficiently.
As Originium Shard base production takes an hour (before boosts) and Orundum orders trading takes 2 hours each, you will not be bottlenecked if you use operators with right base skills for the job. On the contrary – you still might be able to produce some LMD as there will probably be some down time in Trading Post that you can use to switch to LMD orders, as you will not be able to keep up with Orirock Cubes farming.
The Math
It takes either 2 Orirock Cubes and 1600 LMD or one Device and 1000LMD to produce one Originium Shard. We will ignore the latter as it costs ~4.5 less Sanity per Shard when converting Orirock Cubes.
It takes 2 Originium Shards to trade for 20 Orundum in Trading Post.
You get 240 Sanity per day +2 Emergency Sanity Concentrates per week from weekly missions, so effectively you get ~274 Sanity daily.
274 Sanity / 9.644 per Shard (2 Cubes) = 28.44 Shards per day
28.44 Shards / 2 = 14.22 Orundum orders
14.22 orders * 20 Orundum = 284.4 Orundum per day
284.4 Orundum / 600 Orundum = 0.474 pulls per day
That means weekly you can get 3.32 pulls or ~14.5 pulls per month.
If you buy monthly, card which you can get cheaper by using LootBar, then you might struggle with covering LMD costs, as you will get 80 more Sanity daily. This might be alleviated by downgrading your second Trading Post to lvl2 and using Proviso E2 with some good Trading Post base skill operator like Hoederer, Archetto or even Exusiai.
For Monthly Card users the math changes accordingly resulting in 18.5 pulls per month from Orundum farming alone.
Final Thoughts
As enticing as 14.5 extra pulls monthly might seem, remember that you are hindering your operators progression, reducing your LMD income significantly to nearly non-existent and giving away all your Sanity that coulc be spent on Chips, Purchase Certificates and Skill Books among other upgrade materials.
Also a much more viable strategy would be somewhere in the middle where you don’t spend all your Sanity on 1-7, you still get some materials for operator upgrades, you farm 1-7 only when there is no event running at the moment (because that’s the time when you should clear out event shop and farm efficient event stages), you switch to Originium Shard production and Orundum trading only when you have a big pile of Orirock Cubes collected and you produce/trade them in one go. And as always, to save yourself the hassle and guarantee all the operators you want, just use Arknights Top Up.
Some valuable resources:
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