Analysis, Synergy, and Resonance
In this video, RIEN breaks down how all the characters in Genshin Impact synergize and interact with Xiao.
Do note that because of the way Xiao’s burst works, not many supports can work well with him. This is an important factor in considering what characters to play with Xiao.
Also, you’ll want to consider whether he is the main DPS or the sub-DPS used for cooldown.