Info by Oceanide, Global Server.

Compcheck, stats, formation, pets and imprints.

Obviously, the more imprints is better. Don't forget that it is important for Wu to be in the frontline to receive the Kraken's unitarget hits.

Remember prepare u pet for this event. I recomend this buffs:

Stats and sets:

Mr Wu:

Highest damage possible, having a little more hp% to withstand the blows of the evil Kraren.
Remember that by not receiving critical damage, you will receive atk and speed stacks (max 3 times). This can be a problem after the first hit of the Kraken, as if Ray is not fast enough, immediate injuries will be apply on Monkey. Try to calculate your speed well so that it is (at least) the second turn.

What other options can you use if you don't have the monkey/arti?If you haven't obtained its artifact, you can use Snow Crystal...Few heroes can replace Immortal Wukong here, but you could use Mortelix. I would recommend using it with counter build to perma stack Defense Brak on Kraken and build second and third dps with more dmg.

Miss Bellona:

Secondary damage from the composition. I use it with effec, since its defense break makes the difference between a full clear or not.

Not Death Dealer Ray:

What can I say about this boy, he must be the fastest to start the battle with immunity and clear all the poisons. If you have a hard time keeping you hp team up, you can use Amarillys like me.

I recommend 220 eff ress or higher to ressist all venoms.

The best healer character for this mode is Bernard, but as you will notice I still have him unsummoned in my hero inventory. I've never had any problems with Ray.

Miss Vivian:

It's literally the same one I used for Banshee's Oneshoot.

Don't forget to use Kaladra arti, once she hits the Kraken with her S2 it is 1 tentacle less her damage is absurd.

Improvements:
At level 12~15 you should be able to get a oneshoot if your units have more damage than mine.

For my composition, I apply for extra damage (LvL 5), More hp% and S2 cooldown on the mage unit (LvL 8) and higher damage from the warrior in frontlane (LvL15).