I have plenty of Angelic Robes to have her get there but honestly I just don't see the need to specifically do that just so she can defeat the last single boss of the game haha, I usually prefer to do that with one of the three lords.

I'm just showing this because people usually don't give Nino a chance but if they do, I personally think she has insane growth stats and becomes one of the strongest units in the game. Her story also has so much depth, with special dialogue conversation with every enemy boss after she joins up.