We had quite the problem with DPS!
Everytime we got her to 50% she'd just start curing! Shield Bash just wasn't reliable on it.
I tried a few things to enhance damage like Riot Blade to lower defense and Goring blade's DoT but we just couldn't get her down.

But! Whilst I was out for a meal our Warrior took over and stunned the Cure spell with Steel Cyclone!
Everything just fell into place there.

They also cleared Dragoon without me, we've moved onto MNK now!

Kairi ~ Can I ask what was behind your last name when you chose it? It's a really weird word!