I could go for a strategy that has a very high win rate but it would trade very infrequently. There is a tradeoff of win rate, win/loss ratio and frequency of trades that just cannot be avoided...
Either you have to have massive computing capabilities and test on a huge folio or you have to decide what your "style" is and go with that... I'd do infrequent high probability trades but it's much harder to deal with in the area of drawdown.. a high freq. system might have drawdown for an hour or two, an infrequent one could drag on for weeks and it would be hard to keep the faith... I'm cross breeding those currently, infrequent and high probability but intraday.. a drawdown could not last all that long, in fact two losses in a row would really raise questions about the veracity of the backtest... I just like to sleep well, I'm not a gambler, I like the downside scenario to be contained and well managed.. that's my style...