I think win ratio might depend on the TP and SL sizes; it might be better to look for win ratios over the breakeven rate, and that hold up over time and across markets.

Breakeven = 1 / ( (target/stop) + 1) // with some adjustment for spread and slippage

for the first strategy, BE = 1 / ( (500/5000) + 1) == 90.9%

then increase bit for spread, so around 93%.

But the best thing is to read a few articles to get different perspectives on strategy development, to find one you agree with and can live with. I've found it helpful to start by searching for "avoid curve fitting" and "overoptimization", they always have a few good tips and lead to more articles.

I've also found it helpful to brush up on statistics and probability, statistically significant vs find by random chance. Nowadays there are lots of good video lectures online, much easier than reading a book. I just watch them 2 or 3 times passively over a week and remember a lot, and get the basic ideas and theory.