I tested her in a high - top diamond arena to fill the raid chest.
I’d give her a B+ or A- rank in offense team. High basic stats, endless self-healing, fast AoE. She never died while filling the chest.
However, her skill is not a large-scale destruction, but a utility skill that erases troublesome buffs and damages them, so she is almost powerless against buff-independent defense teams.
Aouda is useful for any defense team. If you have a team build that can ignore JF, Sif, Garnet, and professor etc buffs, I would definitely choose Aouda.
I can only remove buffs with C.Mel +18 (easy to die), so I maxed Caitlin without hesitation.