I really, really, really recommend using him. I rolled him on the rerun as well, and now I’m happy with my two archons lol.
I use him as a support, which you can maximize by putting energy recharge and elemental mastery on him. His elemental burst is very good for rounding together small enemies like hilichurls and slimes, and even then still does continuous damage to the bigger enemies near it. You can also use Pyro, Cryo, Hydro, or Electro to infuse with his Anemo.
Also, if you’re exploring, he’s very useful when you hold his elemental skill, which lifts Venti up into the air. It saves both stamina and time 😀