Bullet's berserk is pretty easy, especially because if you play hyper, just play hyper till the time is equal. And if you are zerked against, then play at moderate speed till they're at 15 secs or below. https://lichess.org/tournament/summer23 jsyk i didn't berserk much back then.
Hyperbullet
It is also pretty much an easy berserk win in hyper, just premove until equal time. If you are berserked against, then premoves get you a far, far time advantage. https://lichess.org/tournament/IZ2eJNL1
Ultrabullet
Ultrabullet berserk is something where i don't recommend berserking back higher rated players. They have insane premoves, so don't berserk back unless you are sure you can win. https://lichess.org/tournament/oMvWr3dj
Superblitz
Easy berserk and win, just moderate premoves and you win. If you get into the redzone, that is your premove warning. When berserked against, play complex for time and positional advantages. Premove, that's what I say. https://lichess.org/tournament/DuoQKG1I
Blitz
You can berserk and win, without many premoves. Just don't do unsure premoves, and its an easy win. (I don't play blitz, but i will in the future- https://lichess.org/tournament/spring24 )
Rapid
I would definitely berserk, as it is an easy win even with no premoves, just premove when under 30 secs. When berserked against, play normal, non-risky, and complex. https://lichess.org/tournament/MxUMv00u
Well, what is it?
I think its Superblitz, but what about you? Answer in the comments!
