A list of recommended builds for Karenina: Ember can be found here. Each tab represents one build — click the tabs below to view each one. See here for more information about Ultima Awakening and resonance slots.
Disclaimer: Memories displayed here are arranged so that their stats are optimized based on their varying values in different positions. However, it's more cost-effective to arrange all 2-piece sets in top slots for easy swapping between builds, even if stats aren't optimized.