Digimon Story Time Stranger: Endgame Exp / Money Farm

Steam Community guide by Lawlben.

Mud Frigimon - Cosmic Fire - Late Game

Honorable mention for this AFK method.
There are videos all over youtube about it.
AFK on the hill where the Mud Frigimon roll down the hill and let the auto battler take care of it.
Pros -
full AFK, no inputs needed
**Surprise Encounter rare digimon ** -- this is the biggest advantage to this method as it allows you to get Immortals eggs which can be crafted into the best accessories in the game.
Cons -
Very slow
Thats it, its slow but allows you to gain Immortal Eggs if you're lucky and no inputs are needed.

End Game - Before Final Boss

The first farm requires you to complete the Royal Knights quest line. None of it is hidden, it all shows up in the quest tracker.
Once you have finished the quest you will be able to fight any of the Royal Knights at the top of the tower in Central Town.
From the couple I checked they all give the same reward, 20,000 exp and 30,000 Yen but some of the fights are extremely hard if you don't have a strong roster.
The one we are going to be fighting is Gankoomon.

The reason we choose Gankoomon is twofold. He is the only Royal Knight that can be inflicted with Poison and he also primarily does physical attacks.
The strategy is extremely simple and abuses reflect and deadly poison.
First up you want digimon that have more than 3000 speed as Gankoomon has 29xx speed and you want to go before him. If you don't have 3000 speed you can also use a digimon with the personality trait that allows them to act first or go hit the gym (digifarm). The green version of Aegiomon has the highest speed stat.
All you have to do is start the fight and use physical reflect, Gankoomon will literally kill himself.
If for some reason you do not have access to physical reflect then Deadly Poison is the next best thing. I use Lilithmon who has 100% chance to apply Deadly Poison + Injury on all enemies. While not really necessary for Gankoomon it is the carry for the post game farm so its a good idea to level her up while you're going.
Same strategy - make sure Lilithmon acts first, either by having high speed or the personality trait and apply the poison. Guard / Heal spam until Gankoomon dies to poison.

Assuming you have acted first and used reflect or deadly poison the fight is over in approx 30 seconds which nets you 20k exp and 30k yen.
Sometimes Gankoomons AI is stupid and doesn't attack but spam buffs himself, this will make it take slightly longer and this is also why we use deadly poison. Since he acts 3 times per turn even if he doesn't attack he will still die to poison really quickly.
TLDR - Physical Reflect & Deadly Poison.

ClavisAngemon Charm - Special Note

There is a missable item called ClavisAngemon Charm. It allows you to start the fight with Physical Reflect already active. If you have the charm you can put it on a slow digimon and Gankooman will probably kill himself to reflect before you can even act.
The charm is acquired during the prison break section of the main story when ClavisAngemon is chasing you around. At the end of the segment you will be prompted to lock him in a jail cell.
There will be a grey screen "time stopped" effect, walk behind ClavisAngemon and inspect his butt BEFORE touching the lever.
Google it if you need more help finding it.
Like many others I missed it during first playthrough, it is not needed but can be useful.

Post Game - Olympos 12

Let me say this straight up. THIS FIGHT IS HARD. If you don't come prepared you will fail. The fight is very long if you are not vastly over levelled and prepared.
The fight involves defeating all of the Olympos 12 digimon in 1 battle, but its harder than that because you have to kill their base version and also their digivolve versions.
What that means is you need to defeat;
Apollomon
Dianamon
GraceNovaMon joins the battle after Apollomon and Dianamon have been defeated
Minervamon
Mervamon joins the battle after Minervamon is defeated
Marsmon
Merukimon
Neptunemon
Venusmon
Junomon
Bacchusmon
Ceresmon
Vulcanusmon
Jupitermon
Jupitermon WM joins the battle after Jupitormon is defeated.
Each time you defeat one of the digimon another will join the battle so there are always 3 active digimon.

Olympos 12 Strategy

The Carry - Lilithmon. Phantom Pain does crazy damage and a lot of the Olympos 12 are vulnerable to Deadly Poison, Injury also prevents the enemy from healing (yes they can heal) and there are always 3 active enemies until you reach the end. They also have the Deity tag which makes Phantom Pain deal even more damage.
Lilithmon will probably die a lot when you first do the fight depending on your level as some of the Olympos 12 are Vaccine so they deal extra damage to her.
Combo Magic is the rare trait from Sly, once you have the trait you can move her to Astute for the damage penetration from Agent Skills.
Being overhealed from the "Great Embrace" traits makes Combo Magic happen all the time.
this interaction has been fixed. If you don't like combo magic you are free to change to another trait.

You need a healer digimon, Venusmon or MarineAngemon. Can use both if you really want.
They must have the personality trait "Great Embrace". This is the rare trait from being Overprotective.
Mandatory - go hit the digifarm until you have it.
All this digimon does is spam your AoE heal (Love You or Ocean Love) to keep everyone alive and healthy, the enemies hits multiple times per turn and they hit hard.

Support Digimon - Needs to be tanky - I used Omnimon, can honestly be anyone just make sure they can take a hit.
Give them magical reflect, physical reflect and character reversal
Mainly uses physical reflect. When Jupitermon enters the battle at the end you must use character reversal on Lilithmon.
Aegiomon Setup - I had him in Green mode since that has the highest Speed Stats.
He is just another support, he gets dunked on very frequently.
If he is healthy you can use him to buff speed otherwise use phyiscal reflect.
IF GraceNovamon is on the field then use Magical reflect instead.

Reserve Digimon
Bring whoever your strongest 3 digimon are. Make sure you have someone that can revive Lilithmon or use items to bring her back. The main team will carry you just have to keep them alive doing their thing. If anyone dies make sure to revive them and sub them back in. Bring more reflects if you need to.

Dealing with GraceNovamon

GraceNovamon enters the battle once both Apollomon and Dianamon are defeated. Both are present when the fight starts.
The main way of dealing with him is via reflect. He does both magic and physical attacks which is why we have 1 digimon using 1 reflect with Aegiomon using the other so he will eventually die to reflect.
The 2nd way is by using Character Reversal on Lilithmon. This will make her deal substantially less damage to the other digimon but it will allow her to destroy GraceNovamon, once he is off the field cleanse Character Reversal until Jupitermon shows up.
GraceNovamon is the biggest annoyance during the fight so dealing with him immediately has its advantages.

Dealing with Jupitermon

Jupitermon is by far the biggest threat in the fight. He does insane damage and gigabuffs himself to do even more. The first time i tried the fight I failed to Jupitermon WM who enters the fight after Jupitermon is defeated.
Use Character Reversal on Lilithmon as soon as Jupitermon joins the fight.
thats it, thats the strat. Keep pressing physical reflect and Phantom Pain.

The Rewards

Once you have the fight on farm you will get a huge 780k exp and 300k yen for about 5 minutes playtime.

Final Notes

Depending on how strong your digimon are the fight may go on long enough that you need SP restoring items.
Speaking of items, don't forget you can use items during your turn then still have your digimons turn after. This is good for reviving or using buff or cleanse items when first attempting this fight to make it easier.
I know my digimon in the screenshots are all like level 99 but that is post farming. I think Venusmon was level capped at like 57 when I first killed it because I didn't realise you had to dedigivolve and re-digivolve back for talent to increase LOL
The original team i used to defeat them was this -

Venusmon literally just spams heals
Lilithmon uses Phantom Pain
Aegiomon was a support bot, speed up and x aura because I didn't know about the reflect tech at the time.
Seraphimon would come in to rez Lilithmon then switch back out, she died a lot during the first kill.
Omnimon, Imperialdramon, Beezlemon where just doing stuff to keep the fight going and help deal damage.
During my first kill I didn't use reflect. I only started using it when looking into power leveling.
Can this be optimised even further ? probably but this is just how i did it.
If you cannot farm the Olympos 12 efficiently then go back to Gankoomon, he is waaaaaaaaaaay easier
TLDR - Reflect and Phantom Pain go BRRRRRRRRR.