There are some great posts on this sight on tanking macros and rotations as well as spec advice.
A lot of people prefer a DK over a pally - but they are both very capable.

The shamans are brilliant for instancing. I'm going through outlands at the moment with a team, and it has been great fun.

I'm running with a tank, 3 dps and a healer setup. I'm able to just spam one key after the initial pull by the tank, and throw lightning bolts in to the targets.
The healer just has to top up the tank as I have the shamans all heal themselves for aoe. It really doesn't require a lot of micromanagement.