Jesus, no wonder the mages have seemingly fallen in with the Venatori.
Eh, the Inquisition will slide into that spot well enough, I think. If possible, anyway.
She's doing a marvelous job in this case, keeping her fellow mages in check in the hinterlands. Though if she's in charge I'm not even sure those acts against common folks aren't welcomed.
The fact that untrained guerrillas are maintaining an even fight with a substantially larger army trained to kill them specifically is quite impressive as it is. If she is responsible in some capacity, it's obviously a bad thing, but DA PCs can hardly avoid associating with everyone who's done bad things, even murderous/negligent ones.
How do you think Adrian could be as the new leader (in that scenario), and how Vivienne might react to her?
Not well, in either case. It's not impossible for her to pull it off, but she'd have to listen to Rhys' advice carefully, and Rhys would have to put aside all of his own resentment... Fiona's death, if it indeed happened, would be a terrible blow to the rebellion's leadership.