Alright for me it seems a complete nonsense to build her but i keep getting copies beside I have a chance to get her to +6 on this event, so should j invest ? And if yes why?
If you're not on the same playing field as the opponent immortality can come in clutch against fully ignited teams in PVP. Mostly useful in crit manual teams and a good pair with Thisbe. Dana is needless if you go for that strategy.
As 3rd or 4th healer in endless duel mode maybe? She has immortality and prob. debuff immunity (when ignited) , which is nice. You could use her like a slow but healing Thisbe, or a non-reviving Pomona, but then again, I wouldn't.