Tested the Blunderbuss, and this is my results:
Players - still one hit kill
Skeletons - still one hit kill
Gold Skelly - still two hit kill
Wet Gold Skelly - still one hit kill
Wet Gold Skelly Boss - Now 4 instead of 3 shots.
Seems the only thing the nerf did was make it harder for gold skelly bosses.
I'll still use my blunderbuss.
