So I did a 2v2 arena. There was a feral druid with shirvallah of course.
The arena lasted for ~1min and the feral did 483k healing during that.
Now I don't care whether he used cooldowns or not, whether he had better gear or not. THEY JUST SHOULDN'T BE ABLE TO HEAL THAT MUCH BY ANY MEANS AND DO THE SAME DAMAGE + EVEN MORE THAN A PURE DPS CLASS!