Quote Originally Posted by Bena
If you get felguards then you dont get Soul Siphon.. I've been playing the locks and mage combos on the ptr and the mages just do more dps faster than the locks; felguards are more of a distraction. I'm leveling locks on live servers but so far I do better with mages than with locks. If I'm zerged I just aoe the whole place.. you can do hellfire with locks but it's not quiet as effective
Soul Siphon not Siphon Life, 2 diff talents, you can get soul siphon with felguard.

I checked it out and it does work as I thought, If 4 warlocks stacked, corruption, curse, and then drained, you can get 48% increased dmg on drain life.