What the official listing confirms
The official page emphasizes deep spell customization and new combinations, but does not publish a permanent best build.
Use this as a controlled first-session test
Freeze path, encounter and difficulty while changing one Memory. Record the first meaningful difference.
- Name the encounter problem
- Choose one Memory change
- Freeze the rest of the build
- Retest the encounter
- Record the difference
Keep the answer current
Echoes of Mystralia is in its launch window. Verify patch-sensitive values in the current build and record the date before treating a route, build, or requirement as permanent.