Right now an ally lock is using permanent corruption with 3x ID on the training dummys to have permanent 100 stacks and three shotting everyone at the horde boats with drain life
hes been doing it for a week, literally unkillable and surely an exploit
It works like that since legion. There are videos about it where locks put their corruption on stormwind training dummies and then they duel in front of stormwind for gold.
So yeah…It works since the talent was introduced.
Although it was a little bit different without the azerite trait but it almost had the same result as today.