Finally beat Syldra. Rosa was not cutting it since I kept getting destroyed by a single bit hit late in the game. Switched to Ovelia with her last stand healings and it worked much smoother.

Ended up using:
Ayame with awakening
Noel with his awakening and Glint+
Laguna with imperil USB
Tyro
Ovelia

Now need to get my ice magic team in order. That fight doesnt seem as bad but my team is much worse.