I'd do 2 shadow 2 disc, which you can switch to 3 shadow and 1 disc as your gear level rises. shadow does significantly more dps so I wouldn't do 4 disc, you'll be so bored you'll want to pull your hair out!

Time spent playing with macros is never time wasted, as you have to do that at 90 anyway, so you might as well get a feel for how you like the team at lower levels.