I do really like Gorgon Archers, but they aren't that difficult to neutralize once you know how. Purify will remove all of the Weak conditions on you in a single spell cast, and Healing Wand can remove them one at a time. Both of these are Holy, which can be painful for a Warlock, but it is possibly still worth including one of them.
The best way to handle the Gorgon, however, is to simply get in her face and not let up. She can not use her ranged attack if she is in the same zone as her target, and her Slow trait keeps her from running away without major support from her Mage. As long as you don't let your opponent keep a Mage Wand bound with Teleport, then simply focusing fire on the Gorgon with melee attacks should remove the threat really quickly.
You can also put up walls to block her Line of Sight.
If you do get a lot of Weak on you and you can't remove them, I would recommend getting out another creature to threaten your opponent with. Possibly use Enchantment Transfusion to change all of your buffs over to the new creature, if you have that expansion.