Personally, I would be quite concerned about those 13% and 14% strike rates for those selections > $10. Even though those selections seem to be rewarding your method for now, you must admit that when considering their lower strike rate, they have the potential to make your method come undone in the long run.

If you really want to keep betting the longshots, why not remove those selections that are > $10 from this method and let them be a separate longshot method that uses a separate betting bank. You could use a staking plan of 2% per bet for the method with selections paying < $10, and maybe you could use a more conservative staking plan of 1% reducing for the longshot method.

Best of luck to you.

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...time held me green and dying, though I sang in my chains like the sea. - Dylan Thomas