I say the rotation should be year-round.

Think about it, that give more than enough time to rank up and keep the rank.

and at the end of the year the top ranked people qualify for the Toribash World championships.

One year is too long imo, 1 month does feel a bit short but it will be good activity wise. Maybe a fresh start every quarter/season could be a good compromise ?

@Avatar,

Letting the championships to people playing for ranks ain't a good idea imo. Some great players just play for fun and don't care about their rank on a daily basis, but they care do care about events and competition.

Lol true didn't think of that.
How will clan wars work since they are ranked and fun servers cant get ranked..?

Clan wars have their own separate system (which is being revamped as well), the ELO ranking only concerns individual ranks !