1 - In my job capacity I work to handle implementation and support of all 3rd party tools, including Adobe Analytics, Google Analytics, eBay Enterprise Attribution, Coremetrics, DART, Mediamind, Ensighten, Tealium, and Adobe Dynamic Tag Manager, etc.
The implementation through the tag management system took a bit of trial and error at first, mostly due to the asynchronous nature of the TMS. We had to manipulate the implementation to assure that the Optimizely code was written to the page at the right time to allow the experiment content load in the browser without showing any of the original content first. We also needed to make some adjustments to the TMS code to get the integration with Site Catalyst timed appropriately.
Product training is always preferred over self-training. This helps to have multiple people with a similar product skill-set available to assist with projects and train others to the same level of expertise.