This is a very powerful method which gives you insane health regeneration making you almost invincible.
Instructions:
- Acquire gear or enchant with leech stat.
- Go to opposite faction capital.
- Dot every training dummy with absolute corruption.
- Enjoy.
I discovered this independently but I know one or possibly more warlocks discovered it themselves. So far as I can remember it hasn't been posted here though. (the warlockolol method is slightly different and not as powerful though it worked on the same basic principle).