>>37199122Sorry to answer this late.
Scald and Hex can go a long way, but what really helped her was access to Recover. And yes, I know some people find recovery moves a waste of a slot in the maingame because you can just use heal items, but I like to use them.
With eviolite I'm pretty sure she had the highest defenses by stat on my Black team, but then again I ran an unconventional team.
She was pretty useful to handle caves and absorb water attacks directed to my Chandelure. In important fights she was normally able to either kill or cripple mons. The problem I found is, the kind of set she can run depends a lot of not getting crits to RNG, and in the end-game you start to run in a lot of trainer fights that spawn physical crit moves. So she becomes noticeable less useful against physical mons due to that bullshit.