Gok'amok is impossible. Tips plz.

The AoO solo adventure was a stroll through the park until I reached this boss. Then the difficulty level turns up to 11. What the hell! This guy summons huge threats or casts devastating spells for 1 mana. Meanwhile my deck Ive been given is garbage and in so little time to deal with the threats your outcast cards better be perfectly lined up.

Is there something i'm missing? This guy seems impossible to defeat.

Assume board control, make the best possible trades and fully utilise your Outcast effects. Once you've secured the board, quickly rush down the mecha-ogre hybrid before he can recover and pray to RNG god

Honestly, just pray dude. 

I just replayed this match to remember how it works. I think the match wants to emphasize Demon Hunter fundamentals - focusing on the super powerful outcast effects of your special ally cards, making sure you're using your health as a resource to control the board and getting the +2 attack out of your hero power, etc. You want to ensure your opening hand is a low enough curve that you can get those outcast cards positioned well.

Sometimes the random effects create ridiculous early game tempo for him, but other times they're pretty medium and stall his ability to play from his hand. Other times they can go entirely south for your opponent. So if those fundamentals don't get you over the line, just try again. In my match just now, he got a hand full of random demons, played Unlicensed Apothecary at the end of his turn, but then had another random effect summon two minions. That took a big enough chunk of his life total that the AI started to act as the control and I was able to pressure it down.

So in other words, luck out.

I just played the match two more times, and won one of those two. So now I've got a 66% win rate against Gok'amok for the day at this point. I'm not saying that to brag or be a jerk about it, but rather to emphasize that it's not just a matter of "lucking out." The whole point of the Ashes of Outland story content is to get players familiar with the fundamental play patterns of the Demon Hunter class.

Because his hero power costs 1, Gok'amok plays slower than his deck should. So unless he gets a very powerful random effect early (something crazy like Deep Freeze) you should be able to get on board early. That will help ensure your hero power's attack value is +2, which is a big deal if you're trying to trade health for board control. If you mulligan for early board control tools (e.g. Furious Felfin, Imprisoned Felmaw, Twin Slice, and Chaos Strike) you should be able to maintain control long enough to snowball into your bigger outcast effects.

Ultimately you're the aggro in the match-up, since his hero power will out-value you eventually, so you need to be pretty liberal with your health to make sure you don't lose your board, and only take the highest value trades or trades with rush minions so you can keep pushing a bit of damage to face each turn.