I don't even really know where to begin. It's pretty much all in the title. Shes just comparatively bad these days and I feel like she has little to nothing to offer the team on these difficulties.
She was always the worst of mages. Mostly because of being the only one without barrier.
She could be useful on NM. Even spirit marks isn't that bad there, blizzard can constantly freeze targets and walking bomb will add this spirit damage numbers.
What I can say. She has design problems. Walking bomb in general aside from 1st hit can't crit. Her skills in general are low damage types but on the other hand she has massive amount of damage passive.
Pretty much fade cloak is her best offensive spell...
She needs some help in defense area, either some armor bonus based on whatever or some proper way to get barrier. She also needs fix/redesign of walking bomb, proper damage of explosions, ability to crit with explosions, etc.
It's fun with weekend challenge. Revenant taken with spirit mark can make some nasty mess around.