You have a really really nice roster, wow! Aventurine would fit well into your roster for Dr. Ratio and just as an overall, comfy shielder like Fu Xuan.Hey! New here, although I have been reading you for quite some months already. Following the Aventurine's topic, I wanted to ask you for some advice as tomorrow the banner is coming and I haven't decided what to do yet. These are my characters and I own 240 tickets right now.
I wanted to go for Aventurine because Fu Xuan is very comfortable and I've been really appreciating the shields in this game. However, Gepard E1 just came out soon the other day as I was fishing for Gallagher E4, so I have the next one garanteed and I'm not sure who to use it for.
1. Aventurine: I enjoy the character and his kit, but maybe I already have a lot of sustainers (really like Bailu and Galla is doing also fine with Acheron).
2. Robin: Literally my great interest in Penacony started when I saw her first leaked design, but after seeing her gameplay I'm discouraged because I don't know if I like playing with a "three people team."
3. Firefly: Everything about her got my attention but we don't even know when she is coming and can save.
I would almost say the next thing your account could use is a 5 star Harmony, whether it be Robin or you could wait for a Ruan Mei or Sparkle rerun. Very nice that you have Bronya E1 and a Tingyun though and it seems you use Nihility teams more than oure hypercarry.
At this point, I would say follow your heart and pull what excites you the most since your account is really well balanced already.