I had the follwoing teams:
1) 4 DKs + 1 priest
2) 1 pala + 4 shamy
3) 1 pala + 1 mage + 1 lock + 1 shamy + 1 priest

The DKs/priest were annoying (watching one toon walking through the hall after pressing interact with target...), pala/shamy felt like a relieve compared to that, ranged dps is a lot easier than melee dps.

But I have to say - the mixed team is a lot more powerful than the pala/shamy combo.

I use simple castsequence, just one-button, nothing fancy, no special abilities and I cut through inis that would have been a challenge for my pala/shamy team at that level.

Maybe its cata, maybe its just that I have now the ini experience - but I really enjoy the mixed team.

From what I see now, its tank (pala) +heal (priest), then getting the main raid buffs with hybrid dps (shamy, lock) and then add pure dps (aka mage).

Can't wait to get the 10box complete...