During Q1, we will be introducing Facebook optimisation. By then, better results, higher ROI and less work will be accomplished with AdWords.
With that said, you will also be able to optimize between FaceBook and AdWords. We will find exactly when clicks or conversions are better in one platform or the other, and optimize accordingly.
We are currently beta-testing; if you would like to join just ping us: firstname.lastname@example.org.