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Finally, I found someone who shares my views on this issue. And I want to say to you, gentlemen, that you are fixated on the second hero. You managed to do it once, and you've been playing that way ever since. Try something different, and then tell me.
You can spend days perfecting a week's worth of development with one hero, but any average player will do better with additional heroes right away. Don't you find it interesting why many people buy 2, 3, or even 4 heroes in the first week?
And can you tell me how 6 beasts will help you?