The tainted aquagoblin and corrupted shaman

[SowIsLifeSowIsLove]

First off, holy shit this camp sucks. Underwater, dealing with chain casters that have bows and arrows as well, not fun. Wiki has the tainted spawning in only two of three spots with deepwater goblins being the PH. However, there are other deepwater goblins around the tower, can anyone confirm if they've had the tainted pop in one of those spots as well? Because honestly killing for 6+ hours and only having 1 tainted pop (corrupted has < 50% chance of popping from tainted) doesn't seem right!