Arena 6 in Club Wars

No matter how good the strategy of a club is and no matter how much money has been spent upgrading the disaster, at some point each club will have reached a rank where the other similarly ranked clubs have equal or better strategy and disaster. At this point, all clubs have an average win rate of about 50%.

The impact of a wide lead in the used variant of the ELO rating system is very, very low. Even with double as much points than the opponent team you will only get a few more rating points. What really matters is, weather the opponent team has a higher or lower rank as your team. For a win against a higher ranked team you get more rating points than for a win against a lower ranked team. This makes it very hard for the top team, to get far more rating points than the second ranked team.

Further, each war ends in an equal transaction of rating points. If the winner gains N rating points, the loser will drop by N rating points.

My understanding is that the entire rating system is a closed system in which the total number of rating points(= number of clubs * 1500) is distributed to all clubs according to their strength.
Putting these things together, I think, arena 6 can only be reached when the whole community of clubs participating in club wars is growing.