For a common troop she would be ok, bad because she still needs allies daemons to explode up to five purple gems. So she’s stuck with two restrictions and a selection of traits that also feels like a lazy excuse of a job. As i said before she could have Empowered and improve a little the mana flow of the team as the battle starts. If you lose allies she loses her utility totally since she does nothing else.
Not every Ultra-Rare needs to be a Wisp but damn, the devs really want to start 2019 showing this much lack of interest for their first new year’s resolution: