I'd reconsider doing this in the first place. Reverb on the master bus is unideal for a number of reasons. The biggest is that it will affect bass guitar and bass drums, which is a recipe for mud. You'll also want to be able to tweak the amount on one instrument vs another. The "right" amount of reverb for vocals might be fairly low to keep the siblance from ringing for weeks, while a pad might sound better with lots of reverb.
That said, there's definitely something to be said for using the same reverb patch across all tracks. It gives a nice cohesiveness to the sound. It's easy to do this. Just create a stereo reverb bus, and create sends in any channel that needs it. You'll be able to tweak the amount that each channel gets, and you'll still have a nice, natural sound.