This was tested on Naxp BG Extasy 3.2 and its still working as of today.
1. Create a Warrior
2. Gear him out with nothing but armor penatration gear (gems etc..)
(you should have about 1200 armor pen after done if trinket procs)
(a nice trinket is grim troll or something. adds like 600)
3. Once he has nothing but armor pen gear spec him into titan grip
4. Equip 1 Betrayers of Humanity and a shield with 6k armor
5. Take off all your gear but the shield and axe
6. Then go to a trainer and unlearn all your talents.
7. The shield should disappear
8. Cast battle shout
9. now respec into titan grip
10. equip the axe and the shield once more then logout
When you log back in you will not notice anything has changed. your ap will be normal so will everything else. But for some reason this bugs ur armor pen rating and gives it like 50,000 armor penatration. you will 1 hit everything.
Im not sure how long until this gets patched but naxp is always fixing bugs. btw this is only working on mangos.