If you want to auto-use a cd, i'd say put foresight there. Its pretty weak so it may as well be used when ever.

I highly suggest putting mercy stroke on your fast blade macro though. There is no situation timing of this skill. You wanna keep it on cool down and no need to waste a hotbar slot (especially if you use controller).

At first I had rampart on the macro as well, but it is a good idea to start using it on its own (even if for now you just keep it on cool down). Your only chance to be better than most tanks is to be better at cool down cycling. Practice now to excel later.