Hey Stefanos,
Glad to hear that you already have some good results. Just take it easy and increase the number of the EAs slowly, so it will be manageable.
According to my experience Profit Factor of 10,15,20 is not just amazing, but super amazing 🙂
When you trade longer you will see that the average is lower but as long as you are with a Profit Factor above 1, than it means you have more profits than losses 🙂