This tierlist is going to be based mostly on my thoughts rather than facts because we havent played that much this season and people are still testing things. However, I'm pretty sure about where to place some gods so here we go.

First some notes: This S9 patch have been great for anyone that can take advantage of crit and some attack speed items, so phys adcs and autoattacks junglers are much better right now, I'd say theyre the ones that benefit the most. Ability junglers remain the same, only noticeable change was the buff to hydra's and i guess you might want to try crit on some of them. Also, all mages are better overall, theyre still not the best role in the game but I think theyre finally good enough to be played. Magical adcs remain the same, despite some direct nerfs (sol & olorun) they got tahuti upgrade, so theyre the same or even better because now they dont even need demonic (They can cap easily without it) and they can go shard if they want. Supports remain the same more or less, the only great changes to them have been the new/upgraded actives. I'm kinda lost about warriors, the only thing I realized is that most of them are not buying axe anymore, some of them are trying to replace it for either bluestone or infused. Solo Guardians/Magicals are quite better rn because of the buffs to tainted, jade, celestial, voidstone, breastplate and the buffs to tp and blink.