If you want to use her frequently use her, GO for more than NP 1. NP 1 for Lady Avalon is fine, so you can focus more to the anniversary. You can even go to level 120 her as early as NP 2, but more copies is better.

Just give her a black grail and np 2 with double koyan you will be fine

^

What they say are true,black grail solve everything I do agree but there are events and certain node that you want to use full bond c.e/qp c e and such

Np1 full normal free quest farming?go ahead

But 90/90++ and such crit and rng is required if you didnt equip black grail?good luck~

Mine is at np4 and was at 100 max fous half and month ago,sometimes farming exp(full bond exp) she need a face card cuz damage is not enough but mostly she doing good

But yeah it's all up to you