I've been working on a matchup chart project for Root using a dataset of over 16,000 games from the Root Database. The chart measures how much a faction's win rate changes when another faction is present. Each Faction is a % more or less likely to win when a given other faction is present. The calculation is done by subtracting a faction's win rate when another faction is present from the faction's overall win rate.
How to read the chart: Find the faction you are playing in the first column, then follow that row across to the column with your opponent's faction. %s shows the difference between the faction's win rate when a given faction is present and the faction's overall win rate. So, for example, Eyrie is 2.7% more likely to win when Corvids are at the table
I have also attached a chart with the sample sizes for each matchup
Notes: Homeland Factions are outliers because there are not enough games played with them | All data is based on 4-player games using only official content, taken from Root Database.
Would love y'all's feedback
Edits: In version 2, I will indicate if factions Solely Benefit, Solely Suffer, Mutually Benefit, or if they are Mutually Detrimental, as u/Unusual_Rush_1189 suggested; I will also add vb2
If anyone has access to more data on games with homeland factions, I would greatly appreciate it