I would say this depends a lot on how you want to play. If you want to group with other people, then this duo is great. You bring heals, buffs, great dps in melee and very nice dps in spells as well. All you will really need is a tank for most situations.
However, if you plan on duoing, I think you will have a hard time tanking decent mobs if you use the rogue. It isn't the conventional tank/healer, but that is very ordinary and not for everyone.
All in all, it depends on how you want to play. You will almost always have a spot in groups with those classes should you choose to group.
One caveat, however, is that I consider rogues to be a more focus-required class to play. As a rogue you need to stay behind mobs (means you might have to run in case of ping-pong), you'll also have to evade if you get aggro, and of course you will want to hit backstab as soon as it pops up (usually). This is good because the class gives you something to do, but it can be a deterrent for a two boxer.