Easiest champions to get used to. SS being the easiest and D being the most difficult.
Very easy to pick up and no long learning time.
Very easy takes a little bit of time to pick up
Easy But you gotta play 15+ matches to get completely used to it.
A little harder. Easier if you buy the right items, but must have some form of aim and or game sense.
Coordinated cooldown based. Must have game sense and knowledge of team fights.
Difficult but very useful; harder to learn. Can turn small fights around.
Difficult. Must learn to sustain and keep track of other players cooldowns when versing.
Harder; but has the ability to change the game with 1 or more abilities.
Very difficult. Must stay alive; increased focus on cooldowns and player locations required.
These characters are the most difficult. Very team based and or heavily reliant on cooldowns.