Description
S+ Tier
Champs that are great because they can abuse the utility they provide or spam very strong abilities.
S Tier
Champs that are typically stronger than A tier but not as broken as S+ tier.
A Tier
Strong champs that are similar to S Tier but not as broken due to less mobility, abilities that aren't as game changing, or can be outplayed/spammed.
B Tier
Champs that can be strong in the pre-6 laning phase or are strong in the start-of-game top lane fiesta but are relatively weak after that if they don't get a strong lead. They typically have very good waveclear or strong poke but fall off massively post-6 due to them needing too much time to kill a champ due to doing consistent damage, becoming too squishy, lacking a proper ult to swing teamfights around, and/or just being useless without their ultimate.
C tier
Champs that can work out but it depends on the enemy/team comp, aren't as strong/broken as other champs, and/or don't benefit as much from the URF buffs. Most champs not listed fall into this category but I'll list some of the popular picks I've seen. These also include champs that are simply too squishy or fairly useless without their ultimate.
Meme tier
Need I say more?
Add a Yuumi and it's not even fair.