And he's right. Your VRs won't last on trash (true enough). However, if you're good with your succubus, you can have one of your locks to tank (or any of them actually) as you pick the trash one by one.

Killing a boss at lvl 70 is another story. You nor your VRs wont last.

That's why I roll with 1 Prot / Ret pally, 1 Holy Priest, 3 locks. Some people in these forums role similar too. In the end, a real tank is a real must in consistent clearings of lvl 70 instances.

On the other hand, the 5 shaman videos have proved "some" things are possible without a tank (xbox). Nevertheless, he bets on his Earth guardians to live and have enough DPS to down the boss while they're still alive

If your going to PVP more, you can roll with ur 4 locks/1priest. But if youre going to PVE more, might want to consider getting a tank.