@@user-on3cu6bo4i ok so I'm supposing that you are new ok So furina is actually an off field dmg dealer (it means she will deal DMG by her pets 🐕 without coming on field) so just give her as much hp as you can and if you can get enough crit rate it will then really good, you don't need to use her burst (even though her burst is most broken burst in entire game imo but you won't be able to generate enough stack without Healer so you can ignore er for now) so just give her hp and more than 55 crit rate and summon her dogs then put her off field she will do enough dmg with your on field cherecter Btw this all for new players there is many things that is important but you should ignore if you are new player and also she drain hp so keep that in mind