I wonder...has anyone ever heard of groups? Boom. Get a pally/healer, get another class, go rape PvE stuff like it was an episode of Tellytubbies. Or, just use the pally to farm the PvE, and use whatever other class you want to PvP. That's how I did it with my toons. It's not that hard. And I disagree with the random heal from the pot, since retail pots are a fixed percentage of your health (there are some pots that are a random amount, but very few).
And also, unless they were nerfed since I played, shammies are quite powerful in PvE and PvP. Just in case you forgot to mention them :P
PS: if anything in this post makes zero sense, I'm running on close to no sleep after a full day of work. It does things to my mind...