Limit the number of current "Ransack/Deprive" victims a trader can have to two. Make them choose who to debuff.
Trader debuffs first target, then second target. Upon debuffing their third target, the first target is cleared of its debuffs.
I don't care what you do with BR, GTH, or whatever else traders can do. Just nerf their seriously OPed draining abilities.
That or remove them from game. 8p
If it's too much to ask, at least make a stacking snare that slows the trader down the more targets they have drained.
./trader hate