pallyshams are now my fav team since trying it. chain lightning destroys trash. rshams earth shield combined with simple, strong heal mechanics, makes heals easy for me to control, while tanking mobs.
pally and shammy buffs currently work well together, but lots of stuff being moved around in pandaland.

And definitely agree with MiRai as well. Start of cata, I had no chance in heroics. Only ever managed to get 1 boss down in H VoA. I STILL haven't cleared any heroics, but with the hour of twilight 5-mans, its mostly from lack of trying.
I'm expecting (taking into account Ghostcrawlers explanation of Heroic dungeon difficulties) Pandaland 5-mans to be between wotlk and cata difficulty levels