Angry Grimace said:
Speaking of Mimiron, he's not as difficult as people were making it out to be, but virtually impossible to one-shot. The only thing "hard" about it is people not dying to stupid shit that kills you in one hit; i.e. Land Mines/Shock Blast.
The thing is there's so much out to get you. Shock Blasts, Land Mines, Napalm Shells, Spin-Up, Rockets, Bomb bots....
It gets even more ridiculous on hard mode. In addition to all that, you have to kite the fire to 'good' positions otherwise fire will be everywhere and you will be unable to move. That combined with the strict enrage timer, additional frost bomb to worry about as well the huge damage increase is just....painful. With all that stuff that can potentially one-shot you, to make the enrage you have to have nearly everyone up for phase 4, and that won't happen unless everyone is on the ball.
Our first hard mode kill was ridiculous. 4 people alive, enrage timer blowing everyone up, Head at 0%, Middle at 1%, Tank at 0%, two shadow priests using dispersion and letting dots finish Mimiron off.