Jesus, she's practically immortal
Honestly I'm not sure how anyone could defeat her.
The only way would be to have enough defense and Hex resistance to not be fucked up by her magic and physical attack, or have regeneration on par with her.
But at this point it would simply turn into a "who has the most MP" kind of fight, and I'm sure as a Dark Priest she has some way to refresh her MP pool as well.
One other method I could think off is to have enough fire power to simply evaporate her with nothing left to regen but her magic defense + buffs on top of the hexes are probably high enough that simply can't happen anymore unless we're talking Planet destroyer tier.
It's a bit like watching someone making a Funbro (pokemon) kind of build, it's simply unfair.
