The best investment strategy is...
You need to "see more...."
"the best strategy is not the one that's going to get you the highest return. Rather, the ideal is a good strategy that you can stick with even in bad time." Joel Greenblatt
Bottomline, there is no absolute "best", but there is one that will be most suitable for you! Which means it could be quite different from others.
For me personally, I increasingly favour "growing pies" that are easy to understand and therefore estimate, rather than discounted pies.
What can YOU stick with?