Diversify your portfolio only if you can watch them closely
Diversification is good. You can reduce the risk by allocating investments in various instruments, Industries or by any other means. When there is an issue in one industry your diversified portfolio helps you not to lose the money. It's a famous technique most successful investors use.
Have you ever diversified your portfolio? This strategy does not work if you can't watch them so closely. For investments may be you can watch them but in Trading, it is so difficult. You won't be able to focus and pay full attention to your trades.
You have your entry and exit points but how can you do it all by yourself. It won't help in those situations. Understand the maximum number of scripts that you can watch closely and take action when needs to.
Instead of giving the same weight to all your scripts give more weight to the ones that you know will perform better.