I played it the exact same way I play WoW.
· Run up to a group of mobs.
· Hit my individual movement keys to move the Hunter and Minstrel, which in turn broke follow.
· Charge the group with my Guardian.
· Begin spamming my rotation, which using target forwarding would cause the Hunter/Minstrel to either attack the mobs or heal the Guardian.

That's pretty much it. You can scale that up to theoretically any sized group and it will work. So, I could add 3 more hunters, or loremasters, or whatever to my group and the technique is still the same.