Deathcoil was my bane.
I remember Bestial Wrath really annoying the hell out of me back in the day. Even worse when they let the Hunter share it in TBC. Looking back it doesn't seem that game-breaking though. I also seem to remember just not wanting to bother fighting SL Warlocks in BGs. Didn't know how to deal with it back then as a Warrior, so it really felt like an uphill battle.
Aside from that, normal stuff. Hammer of Justice, basically all of a rogue's CC.
Rogues.
Blind/Scattershot.
For those hating Polymorph you may want to start looking up ways to 'death' it, scorpid food etc.
As for me, as a Warlock it's probably my own Fear :')
The 3 most impactful abilities or spells that come to mind...
Viper Sting - Hunter.
Soul Link - Warlock.
Hardiness - Orc.
Vipersting has incredible value. 1 competent hunter can single handedly shift the front line of an AV by downranking his Vipers to oom healers with dispells while simultaneously placing rank 2 or 3 on high value targets.
Soul Link... Especially on horde side where it cant get purged. This makes fighting melee laughable. 1 warrior... 2... a rogue? Who cares... Send them all.
Hardiness is the BiS ability for pvp by a fairly wide margin.
Soul Link... Especially on horde side where it cant get purged.
Alliance can purge too via items...
Alliance can purge too via items...
This is a fair point, though it doesn't happen often... Certainly not as often has for alliance who are constantly spammed by purges. Though it could happen. I played as SL often during AB weekends as flag defense and during the dozens and dozens of hours I spent against other premades sitting on a flag, it was very rare to lose SL. Being an SL warlock isn't really a thing for alliance players due to purge, but on horde it is incredibly viable.
bubble, lupos (yeah its not a spell), free action potion (the worst one tbh)
Slows. Looking at you, frost mages.