Sham + Ranger
In my opinion on of the best duos out there.
You have: Root (cc), Heals, Slows, Buffs, Dots, Tank, Dps, Nukes, the works.
Ranger can tank pretty easly and have a variety of buffs, procs and nukes that help him keep aggro easly over shaman (with slow, heal and dot).
Not to say that a ranger in stance #4 can give the shaman the opportunity to canni thru the whole fight, even on a named. As Jules said, until u get the Canni IV its going to be a bit hard, and after u get canni AA u will be FM by the end of every fight, meaning no downtime.
Track on ranger, makes it very good to farm nameds. As you dont need to wait on a regular spot. I remember my days farming mielb and then mielc, pretty easy with track and invis.
There the option that you can always kite with bow and dots.
And it is really simple to start a grp with that set, since u have a tank and a healer.
The bad site of this combination is that your ranger is always going to need a few outside buffs, since he is a dps class and not a real tank.
I like the monk+shaman too, but what they miss is the monk to keep aggro, so you always have to be very careful when slowing+dot the mob.
And paladin tank is pretty awesome, altho the lack of dps makes the fights very long (but even easier to start a grp)