- Wear a life leech item
- Put permanent corruption on training dummes (there are at least 4 more in Zuldazar than just the ones in the capital)
- Do not change region or corruption will fall off
I've noticed that only 1% life leech was healing me for an insane amount, becoming literally invincible in a 1 on 3 situation (I didn't lose any HP at all and wasn't even using drain life [which was the purpose of the training dummies trick, to make use of the drain life azerite trait), surely profited from the assassination buff though).
I've stopped right there as I'm not too fond of reports.