My Yae is at C2, and has her weapon at R1. I use Shimenawa / Gladiator artifacts and her stats look like this...
- Crit rate: 50/220
- ATK: 2100
- EM: 200
- Talents: 6/7/7
When she crits, the 3 pops after her burst do like 23k each. If I use C6 sara's buff with skill talent at lvl 11, Yae's burst will do around 35k each pop. She's by no means weak, but IMO you'll get a lot more for your hard earned primos by investing in Raiden. My Raiden is at C0, has R5 Catch, and weaker artifacts and she does significantly more damage. Ofcourse Yae still hasn't had the chance to max her levels out yet, but I don't think that'll be enough to save her here. I still love her though, and don't regret pulling her. She's fun to play and I like her as a character.