I'm glad it worked out for you. Have fun with it.

I don't know if it really matters what skill is tied to it. I haven't found any issues using it with CS but protect would work too. Technically it doesn't even have to be a skill, it could simply be a macro button to change the hotkeys. I set it to CS because whenever I dps I do it in CS which means that I know my bar will always be ready when I am. The change is very fast and doesn't delay casting of anything in any significant way. Then again, if you go into an instance, you will probably cast protect right away, so your bar will be set too. But then when you leave the instance, you have to cast protect again before your next fight, and you could forget. I know I would.