Spec your locks destruction or demo for the felguard (at level 50)

1) Insta pull with pally using Avenger's Shield (not assigned to a keyboard button, just a clickable button on your pally screen)

2) When the mobs reach your pally, hit your "universal pally attack button" a couple of times (macroed as "/castsequence Hammer of the Righteous, Consecrate, Holy Shield")

3) Hit your AOE attack/pet attack buttons till everything is dead

4) Repeat till level 70

The above is good for instances or group pulls, but you might want a smite/shadowbolt attack button for single mobs - should go much faster killing singles at range.