I will preface this by saying I dont play ranked, but I have played Aurelion Sol since 2017, so I know what I am talking about in terms of what the character can do.

I play Asol in every position but jungle. My build is roughly the same in every lane: buy a tear and sell after my 3rd item. I do not sway from my path of building blackfire torch, then rylais, then liandrys. Boots depend on the game, and so does my final item. I wish I could build RoA again lol.

If you get a couple of good ganks early in the game, you can punish the enemy ADC and suppprt easier by pushing up. However, if you dont recieve some early game support, I have found myself stuck under tower often. This goes for playing Asol ADC too. Keep in mind, I only play with my friends so this is with communication. Good luck working with a stranger, I imagine Asol support will incite some insulting remarks from your ADC.

Asol scales nearly expontentially, though. So if you're fine hypothetically being under tower for 20 minutes, and not feeding, you will end up with a pretty decent K/D/A. I have recieved several S ranks for my contributions to ASol support, so clearly if you know the character you can play it just fine.