The way I see it now ,is that 100 races would equate to 50 groups of 2 which gives each group a 58% SR.(2*29)
Please correct me if I`m wrong.

The longest run of outs expected would then be between 8-9.

The average div. to break even would have to be $3.45 based on level stakes.

A method of betting with this high SR would be to increase your bet by say 20% after each winner & repeat the bet if a looser & keep doing this until a desired profit has been reached.

Then start allover again.

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Cheers.