I thought maybe allowing two-sides to this mode.
A mode with stats and without stats.
Maybe even more to pick out levels.
The mode with stats could give exp, well the the mode without it give stats.
The mode with stats give exp based on opponent level and rank.
This way players still get their stats in this mode the players who deserve champion armor actually get it.
Maybe even throw in a third mode that works like regular pvp ranking, based off which shield you have.
*Edit*
And for any money greedy theories.
-Looks at shield based option.-
Basically mean there is face players with same shield.
Still have max stats, so right there they get their stats from cashing.
Or we could have a no stat mode with no rewards.
Atleast then the players trying to have fun get to have just that.