I have 6* Luminara, 5* Consular, 5* Daka and 4* Bariss, if I was given a choice to pick only 1 for HEALER, I would still pick Bariss in my roster for PVP because of her "health equalization" skill can go through heal immunity debuff.
Since our PVP healer AI right now is broken, they will WASTE THEIR PRECIOUS TURN to heal the one and ONLY character damaged with heal immunity while other teammates are at full health even though it will do nothing at all.
When they fix the AI, thats another story :)
P.S. Bariss is also farmable so u know, I got Bariss by farming her shard.