I think timer is not obligatory but recommended, and a RTA timer is fine, but also if you want to make the work easier for the mods, you can put an IGT timer.

Remember, only if you want.

@Etherealxx oh true ._.XD

@xzvs remember that exists pearl cleric trading lol

No, you can only use optimizations mods. For example: Sodium, Lithium and Phospor.

All other mods are banned.

yes, all the world loads have to be out of the in-game time

That would be nice!

I can confirm that Optifine messes with mob spawning like Gelo said, I did some tests and the difference of spawning changed a lot.

bruh

Yes, you can perfectly use a Vanilla Version and sumbit.