Free Agent - NA
Before I begin, let me explain something. Flanks are arguably in a rough spot where its generally (not always) better to just run 2 damages but depending on the elo and map, flanks can still be used in Ranked. But I dont really think flanks are very good atm. Also this is just my opinion. So dont take it to heart because I could be way off on some of these.
s+
These arent flanks... These are champs that carry flanks... hard
a+
Literally the only meta flank that's used a lot. Evie is just a really strong champion. Not much else to say.
a
In the right hands, these flanks can be very deadly. Both these flanks can shred tanks with ease if they are unable to actually flank key targets, and are very annoying to deal with without a team. Carry potential.
a-
Not great but can be very good against certain team comps/players. Despite his recent nerfs, Zhin has a great kit and is very good vs certain meta champs like Lian. Pip does great dmg and cc with one of the best Ultimates. Maeve has insane mobility and shreds tanks with Street Justice, and even still does mad poke dmg with Cat Burglar.
b
Niche picks but they can carry low elo. Pocket Torvald and/or Jenos REQUIRED.
c
Extremely niche but generally bad still. Avoid. Skye is only good for fighting tanks... and at that point just go someone like Cassie or something. Koga? I don't really know what he can do. He could be a lot better but atm he isn't the worst?
d
We all saw this coming. lol