For example...

-include NCHA, NRHA or NRCHA earnings.

-make all winners have to have halter points of some kind, be them regular halter or performance halter.

-make them have to compete in SLOW events AND FAST events. Like Western Riding or Reining or Pleasure AND roping or cutting or working cow horse.

Just a thought. Might spice it up a little.
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I like this.