i used her w/ rex lead vs the sith/empire meta. rex (l), gk, cls, thrawn, and visas. but then I was dropping when b/c of the rex lead and against other rex teams that were non sith she did not do as well so I put raid han back in for her... then I got tired of being targeted, and just switched myself to sith/empire meta
she hits hard. i use her sometimes in my jtr ream in sith t6 raid ... but i feel like in t6 you dont really need healers, i can usually get to enrage using all dps. I have her 7 star and zeta, not sure if she is "irreplacable" yet. I do like her to attack sith teams in TW's though