I do mainly 2A with 1A, and very little of the rest, like 65% 2A, 25% 1A, 10% 3A-4A-5A.
I feel like, when you want to be really good at one certain division, you need to do it at least 50% of the time you’re playing, except when you play a lot (like 4 hours+ a day) then you ‘might’ be good at more than one division.
Unless your name is Takeshi Matsuura, Shinji Saito, or Hajime Miura.
Most people I know who do 3+ divisions usually don’t excel at any of them, or do one division really good but the rest are close to basics.
In countries where yoyoing is still developing (like Indonesia), there are very few who can do either 2A-5A, and the majority do 1A and most smaller contests are 1A only.
When someone is really good at say 4A, usually he/she plays it so much or almost exclusively.