I don't look at the slaves much easier, and I feel good about that. But I am definately not ignoring them.

Likely all you need to do is have a mechanism for telling you when your slaves are erroring (facing issues for example) and put that on the main screen. This is pretty trivial if you use pitbull or stuf or grid where you can easily have a state indicator on a unit frame and code with a plug-in, then look to the addon "errormonster" those events as indicators (stuf i think is the easiest)

While your there you can do the follow status (like jamba does), how far away the toons are from the tank, and other toolings once you get hand of it (direction difference compared to other dps role slaves). You can also trigger poweraura for the slaves on your main easily at this stage.

The only thing normally have on the slaves, when they have no window focus, besides a casting bar is a huge "sexycooldow"n the size of the normal actionbars (which are removed) with a very scaled flare. That can draw your eye to the slaves.

Also power aura some "shock therapy" strobe images on the screen helps too, but that will get in the way of things and use a pot of memory.