What is the best bot that can follow competitors follows who are active? Such as following users who have just retweeted?
Sorry mate, you can't get such bot. But its obvious that if you have ample follower base and you communicate with the people actively then you're sure to get retweets. So, you need to focus on people with large follower base.
There are a few twitter bots being sold in the marketplace that does exactly what you need: http://www.blackhatworld.com/blackhat-seo/f200-social-media/
