Outland instances are great. 710xp per kill in there while in a group of 5 which means once I get the instance down to the point of chain-pulling the whole thing (still learning the pulls at the moment) I'll be able to easily pull in 1500-2000 xp/minute, compared to the 500xp/minute I was struggling to maintain in mainland (for comparison, my priest/hunter solo leveled would pull in about 1000xp/minute grinding to 60 pre-BC).
In regards to Ramparts trash, there are a few groups that are very tricky to pull due to patrols plus spellcasters but I am able to use line of sight to get them where I want. I have to take a number of short "breaks" during the instance in order to wait for a patrol to show up or leave but for the most part it can be chain-pulled front to back.
The first two bosses in Hellfire Ramparts are pretty easy (orc and demon), the orc I can chain-pull right through now if my blessings are up and the demon I can kill reliably as long as I go in full health/mana. The drake + orc at the end is another story though and I have yet to even get to phase two.
The main problem is that all my characters are melee which means when he drops a fireball they all get hit. This in turn means I have to drag my characters out and then reposition them so they are facing the orc again. Once that is done I can usually get one heal off before another fireball hits everyone. In the end I just can't keep up on the healing, not because of mana or DPS but because I spend too much time running around dodging fireballs.
The next time I clear to him I think I am going to try putting all my characters except the Paladin into melee with the orc and then run away from the group with my Paladin. If all goes well my Paladin heals should keep me as the only one on the dragon threat list so I only have to move him around and heal the rest of the group. When the drake lands the Paladin should have aggro and he can stay alive until the orc drops at which point I can commence phase 2. Once there we'll have to see how things go before I determine how I will handle it.
My quest to level 5 World of Warcraft characters at the same time.