Its not that each of the channels aren't valuable, it's that your followers are not everywhere. Well, check that, they might be everywhere, but they PAY ATTENTION to only a couple of channels.
It's important to investigate and find out where the people you want to connect with are interacting. For me, its on my blog - the original social media - Facebook and Google+.
And those are the places where I am going to be spending the vast majority of my time.