The problem with a downhill horse is that the saddle will crawl forward, jamming into the scapula or even up onto the scapula. A saddle should never ride on the scapula. A back such as this usually requires either a crupper or breeching to hold it in place. Too much padding to raise the pommel or forks will require a tighter cinch to prevent the saddle from floating. This too makes for an uncomfortable horse.