Hello Cone,
I prefer to use the trading portfolio because as Petko says when we use trading portfolio we eliminate the losing ones. I’m very satisfied with this course https://eatradingacademy.com/courses/algorithmic-trading/walk-forward-optimization-forex-trading-with-portfolio-eas/ (Walk Forward optimization: Forex trading with Portfolio EAs) because Petko shows how you can do algo Forex trading with 30 strategies in one trading account with only 3 Portfolio Expert Advisors. Have a look at it!