Tri-Essence Facility Guide

Tri-Essence Facility is a system that gives your units additional stats.
It is split in three different facilities, each buffing a different group of units:

INT: Support and Mage units are part of this facility.

DEX: Assassin and Ranged units are part of this facility.

STR: Warrior and Tank units are part of this facility.

Every Facility has up to 3 Wheels/Pages, and each Page is made up of 8 nodes.
Every node has 1 Main Stat and 2 Additional Stats.
Main Stats are pre-determined and the stat it rolls cannot be changed.
The same stat cannot appear twice in the same node.
e.g. on the ACC node you cannot roll ACC in the two Additional Stats, as it already appears in the Main Stat.

Both Additional Stat 1 and 2 can roll ATK%, HP%, DEF%, ACC and EVA, but they also have some specific Stats that can only appear in a one of the two:

Additional Stat 1 can roll Magic Resistance, Critical Hit Rate, and Lifesteal.

Additional Stat 2 can roll Physical Resistance, Critical DMG Increase, and Swiftness.

Each stat can roll in one of 4 Ranks: A, B, C and D.
The value that can roll varies depending on the stat, these are the ranges for the most important ones:

ACC and EVA - 1 to 20 (no decimals)

Swiftness - 0.01 to 4.00

Magic Resistance, Physical Resistance, Critical Hit Rate, Critical DMG Increase - 0.01% to 4.00%

Flat HP, ATK, and DEF are irrelevant, they do not scale with link levels and should therefore not be taken into account at all.

The first thing you have to do in the Tri-Essence Facility is unlock the 2nd and 3rd Pages.
To do that, you have to lock every single A rank stat you get, until all 8 Nodes of the first Page are made of 3 A rank stats.

Once this is done, you will have the option to click on the Awaken button, after which the 2nd Page will open.
Now all you have to do is unlock all 8 Nodes of the 2nd Page, this will give you access to the 3rd Page automatically, without any A rank requirements.

You can now reroll for the stats you want/need, and you will never lose access to the three Wheels.

Once you start rolling for the stats you want/need, it is generally recommended to unlock all stats and focus on the stat that has the lowest % of appearing, in most cases this is going to be Swiftness.
(You can check the rates in-game)

This is important because for every stat you lock, the cost of rerolling increases by 100, and we want to optimize the costs as much as possible.

This is how I go about rerolling my Tri-Essence Facility.
I select the stats I'm looking for in Additional Stat 1, in this case ACC and EVA, and choose a minimum of A rank (This is not the stat I'm going for at first, but if I get a good roll I might still want to keep it)
I select the stats I want for Additional Stat 2 as well, and in this case I'm going for Swiftness. As the minimum rank I pick B, and this is the stat I'm going to focus on.

You keep rerolling at 100 cost until that stat is mid-high B rank roll, then you lock it, and you move on to the next node.
You repeat this until all nodes have the stat you want at mid-high B or above.

Once this is done, you have two options:

Reroll some of the lowest rolls you got to improve them.
For example, if you have some 2.3/2.4/2.5 Swiftness you might want to bring them to 2.7+ (not necessary at this stage)

Reroll for the other Stat, in this case pick B rank instead of A.
Don't forget to lock the stat you already rolled for.

If you want to see visually how to reroll, you can refer to this video.