Yeah take wiggs for instance. It does not do damage in one swoop. It is 3 attacks total, which means up to 60% health regained if they all crit.
Barris is formidable HP-wise, those 60%HP count for a lot which can render the wiggs magic much less effective on her. When applied to allies, it's 60% of their own health, not Barriss', so its effectiveness will depend on the ally.
Good for my 90K HP Royal Guard! Not so much for my Ackbar, but still good.
On the other hand, being a unique grants versatility in being able to choose any char as a leader.
I can team her up with Luminara to get Lumi's health + evasion leader passive and 2 healers for maximum annoyance. Or pair her up with a lot of tanks.
