The Ladder would have a separate rankings than the standard rankings.
Now the specifics of the Ladder joining requirements are up to debate. This is a new idea that I have not thought out thoroughly yet. I'd like to see if there is interest before I put great effort into thinking.

The key difference fro the Ladder ranking and the regular ranking is that Ladder competitors are placed into 'random' games.
There should be Singles, Doubles, Triples, and Quadruples ladders.
For the team ladders the teams are NOT random but actual teams, their opponent teams are random though.
However for singles and teams as a whole the games are matched in some pseudo random manner.
Exactly how is up for discussion.
It might be complicated but I think it would be best to start out with a simple approach.
Random games of all types could be created and people or teams would click a Join Ladder Game button and let the carnage begin. Everyone or every team can get in and play a random Ladder game and the chips will fall. No set ups or refusals to play.
High ranks can't avoid playing lower ranks. It's a truer test of skills.
The scoring system might be different on the Ladder, that needs some consideration.
Ladder games would have NO effect on the standard ranks and scores.
I would think only Sargent or higher ranks should even be able to join the Ladder.
All the details are of course up for debate or further thought.
I think it would be cool though. I can see it.
I'll be glad to help.