Finally defeteated them with DmK. And I'm only level 74 and with 36 LUK. INT was 200 and End/Wis were 65.
I used Sir Leon, Artix and Stan, 5 potions and seaweed, rotten hardtack.
Ultimate Star of Glory - Because it gives All 10 and Health -15
Blade of Awe was shown.
Nick's Toasty Cape - Because it gives All 9
Zeclem's Band lvl 70 - Because it gives Good 13
Fierce Dragonlord's Helm - All 10 and Health -14
Squirrel's Tentacle lvl 25 - It gives All 3, I tried to farm any necklace that gives All 5, but they didn't drop so I used this.
Elemental Unity - The normal version. I haven't upgraded it but the upgraded version also gives All stats so it is very good. It's attack also gives -30 to boost and usually crits.
Legion Bracer for extra stats.
And Stan the Scan Orb. In my opinion, it is better then the 200-protection dragon, with it, you can damage Uthuluc and if you don't have any buffs, Squirrel doesn't attack you so often.
After that, I had All 36, Good 13 and Health -33. Squirrel could to at best, only half damage to my DK and Uthuluc did only third what he usually does.
It was pretty normal strategy with DmK, Inner Darkness on The Witness, Sir Leon stuns the squirrel. If Artix goes before Sir Leon, just attack with him the squirrel. He rarely crits, so don't waste his attack on Uthuluc, but ~300 damage on Squirrel could be very helpful at the end.
Then, corruption on Uthuluc, but it's very wise to use light weapon when doing so. Corruption on ??? -guys gives -30 to your weapon element and -30 to boost. And with Stan, Uthuluc's has All 85 and Light -30. That way, Leon and Artix can actually damage him and Artix can do 150 light damage per turn at best. And since Uthuluc always starts with his health absorption attack and then does his screaming attack that gives him shield, after stunning the Squirrel with Sir Leon, use his Strength Strike to give Uthuluc -20 Dmg.
After that, use Malefic Binding on Uthuluc. It doesn't matter if it misses, it still gives it's debuffs. Weaking Blow doesn't, so use it only after Uthuluc's shield goes away.
Shield Sir Leon very often, he doesn't have any healing ability like Artix does, so he goes down more easily.
After defeating Uthuluc, your chances against the Squirrel are much better if Artix is still at your side. Avoid using Corruption, Weaking Blow, Malefic Binding before the third round with him. Before that, use only other attacks. Also, you have to have one sword, dagger and staff, so you can inflict damage every round with your character. Also, don't stun the squirrel at the third round, before his health is low. If you do, he unleashes his mega attack after coming to his senses, doesn't matter if his cooldown isn't finished.
So, the third round with squirrel is the hardest, but if you use Elemental Unity, Corruption, Weaking Blow and Malefic Binding on him before his big attack, you can survive it easily. His attacks mostly misses then or you take minimal damage from them. At full health, he only did ~1000 damage to me then.
< Message edited by Dratomos -- 3/11/2018 6:54:03 >