Mia or Karla?

Mia's already at her best IV spread so might as well build her up properly first. If anything should you want to try for another Karla later on, Mia can inherit her Even Spd Wave.

If you ask me, Karla shouldn't be using wrath but desperation. Her defenses are decidedly poor, and I've heard it multiple times from people who have played both Ayra and Karla.

Mia I don't know that much about, but her defenses don't really impress me either. For a desperation build I definitely prefer Karla due to cooldown-accelerating weapon. Hard to pass on +spd Mia though, especially without a def bane. I still don't like her potential to survive a second counterattack, though. So if you gave me the choice I would take Karla. I like her weapon better, too. HP boon can be helpful for a L&D desperation build.

Mia and Ayra are pretty close to the same Ayra just have 3 more defense and Mia has 4 more res Ayra has 3 more HP Mia has 3 more speed. Her bulk only lacks in phy hits to Ayra. But Karla on the other hand most of her extra bulk is in her HP she has 8 less defense than Ayra and 5 less than Mia. Really between the 3 it's a players choice and difference in weapons and specials cuz Ragnel Astra is OP. I picked Mia over the both of them personally though. One because she runs DC better than both and Mia's sword when attack + allows higher base high output over Ayra and she tanks magic hits better than both (ALSO I NEVER HAD WRATH)