This is a Cheat table mod that is an updated version of AC Odyssey Tweak Pack for version 1.5.6 of the game.  I am not the creator of the mod, I am only posting it since the mod page for it seemed to be recently deleted and the author of it seemed to have their account deleted a few days ago, otherwise I would give credit to them.  Since it is a cheat table, you will need cheat engine for it to work and I think you have to click on initialize script for it to work properly and then do your edits.

Here is the link to the mod that a user on reddit had a copy of (either use the link or download straight from the files tab.): https://drive.google.com/file/d/1i-IUUf5AM2K9kG4cHldm9CfnLzctpAls/view?usp=sharing 



Since I am not the author of this mod, I will not be providing any troubleshooting so use at your own regard.  If there is anyone not happy with me posting this they can let me know but I cannot imagine that would be the case.

I'm pretty sure this can perform the following functions:

- Disable Horse Speed Restriction
- Custom XP Multiplier
- Custom Enemy Health Multiplier
- Custom Enemy Damage Multiplier
- Custom Max Enemy Level Delta
- Custom Drachmae Multiplier
- Custom Healing : Healing Factor
- Custom Healing : Reduced Health Boosts
- Custom Resource Loot Modifier
- Animal Companion : Health Boost
- Animal Companion : In Combat Healing
- Animal Companion : Healing Multiplier
- Reduced Bounty Cooldown
- Disable Region Levels

Note: I copied the below from the old page using the that old page's url (found in the Posts tab of the original revisited mod) and pasted in the wayback machine site:

Installation:

• once you've installed CE, download the cheat table (that's what this mod is, a Cheat Engine cheat table)
  

• run CE and open the cheat table you've downloaded (ACOdysseyTweakPack.CT from the .zip file) in CE:
• File > Open File -OR-
• from the GUI, click the folder-like icon -OR-
• drag and drop ACOdysseyTweakPack.CT over CE's GUI
  

• make sure the game is running before doing the step below
  

• activate the [ Initialize ] script, let CE open the game process, acknowledge the notification,
  then use the scripts you see listed in the sub-section that opens up

**

Uninstalling:

Not required, just delete the downloaded .CT file if no longer in use.

**

How to use:

The tool is a simple cheat table that can only work with Cheat Engine (thus
you need it installed). After you open the table in CE, you're required
to activate the [ Initialize ] script. The script will then attempt to open the game process (whether it's the Standard or
Plus version, it doesn't matter). You will see a pop-up asking you this
aspect. Click YES. Then the script will scan the game process for some
requisites and once ready, will open up a sub-section with scripts. You
will know it's ready to use once you see the Info form which you have to
acknowledge.

If there are any scan errors, they will be reported in a different window. I am hoping that this works in
future updates (if ever, any), though if something goess off, just
message me.

**

Tweaks Explained:

Disable Horse Speed Restriction
This removes the forced horse speed cap when approaching towns and cities.

Custom XP Multiplier
This sets the master XP multiplier. You can check this is active as there
should be a little yellow circle next to the XP bar when in the menu in
the game. This can be used to enable and disable the multiplier.

The XP Multiplier (blue line in CE, under 'Custom XP Multiplier' script) can be changed in real
time, so no need to reboot the game. Default value I set it to is 32.0. Just double-click it and change its value.

Custom Enemy Health Multiplier
This multiplier defines how much health melee opponents will have. Doesn't affect ships.

The Enemy Health Multiplier (blue line in CE, under 'Custom Enemy Health Multiplier' script) can be
changed in real time, so no need to reboot the game. Default value I set
it to is 32.0. Just double-click it and change its value.

Custom Enemy Damage Multiplier
This multiplier defines how much damage melee opponents will do. Doesn't affect ships.

The Enemy Damage Multiplier (blue line in CE, under 'Custom Enemy Damage Multiplier' script) can be
changed in real time, so no need to reboot the game. Default value I set
it to is 32.0. Just double-click it and change its value.

Custom Max Enemy Level Delta
This sets the maximum level the player can out-level areas and opponent. It
basically configures the whole scaling mechanism. So setting it to 100
for example effectively disables auto scaling altogether.

The Max Enemy Level Delta (blue line in CE, under 'Custom Max Enemy Level Delta' script) can be changed
in real time, so no need to reboot the game. Default value I set it to
is 100. Just double-click it and change its value.

Notes:
Cultists and Mercenaries will always be spawned at their set level.
Neutral opponents such as civilians will always turn hostile at the player level.
Attika will always have an upper level equal to the player level.

Custom Drachmae Multiplier
This permits the customization of drachmae rewards, including random loot.
Values less than 1.00 are permitted if users want to tone down drachmae
rewards.

The Drachmae Multiplier (blue line in CE, under 'Custom Drachmae Multiplier' script) can be changed in real
time, so no need to reboot the game. Default value I set it to is 32.0. Just double-click it and change its value.

Custom Healing : Healing Factor
Experimental tweak to out of combat healing. The purpose of this tweak is to
increase challenge and reduce players' ability to simply run away and
heal.

Players can now set a healing factor between 1 and 15. 1 means almost instant healing, 15 will effectively disable healing.

Out of combat healing is affected by this factor and is proportionate to
the amount of health remaining. Less health = slower healing. Taking too
much damage can result in health not being able to recover at all.

There will always be a very gradual amount if healing whilst mounted and players can also heal when fast travelling.

The ability to heal will start fast, then trail off and then gradually
increase as the player levels up, however what is observed will be
dependent on what the player sets this factor at, so players are
encouraged to experiment.

The Healing Factor (blue line in CE, under 'Custom Healing : Healing Factor' script) can be
changed in real time, so no need to reboot the game. Default value I set
it to is 15. Just double-click it and change its value.

Custom Healing : Reduced Health Boosts
This reduces the health awarded when using adrenaline based abilities as well as when using the second wind ability.

The Health Boost (blue line in CE, under 'Custom Healing : Reduced Health Boosts' script) can
be changed in real time, so no need to reboot the game. Default value I
set it to is 5. Just double-click it and change its value.

Custom Resource Loot Modifier
The amount of resources received when looting can be modified using this
tweak. This applies to all resources except drachmae which has its own
dedicated modifier.

The Resource Loot Multiplier (blue line in CE, under 'Custom Resource Loot Modifier' script) can be
changed in real time, so no need to reboot the game. Default value I set
it to is 10.0. Just double-click it and change its value.

Animal Companion : Health Boost
A tamed animal's max health will be set according to the multiplier the
player defines. This stacks with other animal HP bonuses.

The Tamed Animal Health Boost Multiplier (blue line in CE, under 'Animal Companion : Health Boost' script) can be
changed in real time, so no need to reboot the game. Default value I set
it to is 32.0. Just double-click it and change its value.

Animal Companion : In Combat Healing
Allows tamed animals to heal whilst in combat.

Animal Companion : Healing Multiplier
Sets how quickly tamed animals heal.

The Tamed Animal Healing Multiplier (blue line in CE, under 'Animal Companion : Healing Multiplier' script) can
be changed in real time, so no need to reboot the game. Default value I
set it to is 32.0. Just double-click it and change its value.

Reduced Bounty Cooldown
This doubles the cooldown speed for player bounties. It's intended for those
who don't like simply paying off bounties and would rather go after
bounty sponsors or otherwise feel consequences.

Disable Region Levels
Sets all regions to the player level, and therefore also makes all content
based on region level the same level as the player therefore removing
the level gating in the game. Makes the world truly open for players to
explore at will rather than only being able to tackle sections at the
player level. Regions are now difficult because of the enemy types
rather than artificial 'level' difficulty, as they should be. The result
is a much more balanced and open game. Mercenaries will still be at
their default levels and quests still appear at their base levels - I
haven't tested quest-specific content. From the testing that has been
done, some challenging content will still be a level above the player,
which isn't unreasonable.