Just a further thought - I have a Disc Priest, Frost Mage, 3 x Demo Warlock team and if you specc one of the Warlocks to heavy Demo with all of the Pet assisting skills and forgo a bit of the locks damage abilities you can make the VW into a formidable tank. When I levelled my main - Warlock - I soloed everything using the VW and a demo/dest build - I was always watching my threat meter and soulshattering - could only put 2 dots on at best and judicial Drain Life till I started to pull the mobs attention - with the new mutli team and the dedicated lock/vw team tanking I have found if I give the VW the chance to develop threat and use his 2min cooldown taunt the team can then wail away with full dps and not pull the mob away from the VW. Make sure the remaining locks/FelGuards have taunt turned off and just dps and they are amazing. The team can probably do without the priest as healing is rarely needed and I have him dual-specced shadow and he is nearly always in shadow now. The mage is mainly there for the cc and drinks and portals - love the portals hehe. When they AOE very little survives for long - remember you are questing and the mobs are really overwhelmed by this much firepower - even the end of quest-chain ones are mincemeat.