I use all my fingers. I also play tablet only lol.
“The media's the most powerful entity on earth. They have the power to make the innocent guilty and to make the guilty innocent, and that's power. Because they control the minds of the masses.” - Malcolm X
I use my middle finger, but it hurts my hand like I'm gonna get the RSI stuff if I do fast BPMs for a long time. From what I observe top players mostly use K2 (index?) as main (cookiezi angelsim). Could it be to avoid the RSI stuff? or we just need to get used to this stuff? Non-mechanical keys here. *RSI = repetitive strain injury
**EDIT A lot has changed since this post was made. I changed my keyboard, and after just a month! your hand can get used to osu. Well the pain was feelin real tho, maybe you should stop and try playing again tommorow when it happens. Now I don't experience pain after long streams etc. my stream is slow though
semi-alternate with middle and index (zxzxzx) + middle for slow, hard to acc sections (dominant finger) or index for high bpm jumps (faster finger but less accurate), ring+dex for lowbpm streams (<180) or stamina support [if I end up being tired (on my middle finger where I shift the most weight) streaming].
I can switch between ring and middle while streaming so it's no problem
Index (s) main singletapping and then middle finger (a). I can singeltap only until 174 bpm, any more than that I am forced to alternate