Well you must make sure that you avoid as much as possible races where "anything" can happen.

To quantify it?
I can but don't bet on it and blame me, although it's proven, bet on the longest in any five horse race. Don't have stats on dogs, as I said I lost interest.

That's it, guaranteed profit but long outs.

To me betting exotics is already a gamble moeee, so why not expand on it?

I don't have the time nor the inclination, but I almost guarantee, that if I went back and analysed all your selections for a few months at least, I'm sure there would be a profitable situation betting to win and place only.

I said it before you pick them well but ...
Good luck anyway, get out of your hair now.