In my home I have avoided anything more than 2 gang in most places, just to avoid that "need a map to turn on the light" problem. In the one big box I ended up with I used one of the #10 tapped holes for a 6 hole ground bus kit. Then I used #12 stranded pigtails with terminals for all the devices. It made a very easy install. This was piped in so all the conductors were stranded with terminals. (lots of colors too)
