Hi Ocho. Perhaps limiting runners to 9 and distance <1600m will help.

I run a win/plc method and have found these parameters to be profitable. They worked in my favour again today. I also won't bet on heavy tracks. I don't necessarily have the fav but my selections are usually in the top end somewhere.

Your selections may just need some rules to weed out bad races rather than getting it into profit through a staking strategy.