Eyjafjalla the Hvít Aska banner

Eyjafjalla the Hvít Aska is a unit not quite as powerful as she was on her release. At the time, there were few top-tier Medic options, so she pretty easily became well regarded. But in the time since, we now have multiple new healers that do more, and she no longer even has the AFK-healing crown, losing it to a unit (Haruka) who isn't saddled by being a once-per-year limited unit with a high spark cost! Of course, Eyja2 is still a great unit. Her range, Elemental healing, and global targeting are all valuable tools. However, these days she tends to be a more "specific" solution, such as in IS#5 ED4, or as a QoL option. As for Masteries, Eyja2 has two very strong skills with very different use cases, and the skills to target (or skip) will depend on your needs. While normally outside the scope of this guide, it's worth a quick digression to comment on her Elemental healing aspect. Some may be tempted to view this as necessary given that Eyja2 is the 6★ in the archetype, but this would be a mistake. Note that it was barely mentioned at all in the introductory paragraph! Elemental healing can certainly be useful, but it plays more into Eyja2's QoL aspect rather than being something