Well, if you have Ranger then this whole thing is in the bag.
You see Kraken is not immune to CC, in particular to Knockdown. Strip its armor off and then just keep it permanently knocked down with knockdown arrows and then it can't do shit. I stacked a ton of those before anyway because they are amazing really.
I am sure you can see how good that is because that worm is pretty much the only really hard part there with ridiculous AoE spam.
While you are in process of getting rid of armor - spread to minimize AoE and stall all the trash with teleports, especially Sallow Man can't do shit if you teleport him on some far away bluff, Kemm also gets stalled a few turns once his leap is on CD.
Once armor is off on Kraken, just keep ranger on it with knockdown, kill the trash and take down Rex, he is not a big deal if you have a good tank/support. Don't kill Kraken, it will just respawn and all sworn will be respawned too, which will just make it tedious.
Have a healer around to toss on Ranger a heal or two, because sometimes some trash teleports on bluff around him and it's troublesome then.
Also as a side note, everyone having Comback Kid and Morning Person talents is just amazing really. You can fuckup hard and still do it, simply because you can have as many rez scrolls as you like. That may help you too.
I also heard that tunneling Rex hard also works, but I did it conservatively and killed trash first.
Last edited by Gaidax; 23/09/17 10:34 PM.