In my opinion, there are three main groups of Fibonacci extensions. The group of 38.2% regroups 138.2%, 238.2%, 338.2% and 438.2% extensions.
Then there is the group of 61.8% that assembles 161.8%, 261.8%, 361.8% and 461.8% extensions.
And lastly, the group of 114% Fibonacci extensions regroups 114%, 214% and 314% and 414% extensions key levels.
Each group has its own purpose or role. Therefore, a Fibonacci trader ought to avoid misusing them. In summary, that is the way I classify or group the Fibonacci extensions.