Woah, finally killed Zagraal. Took me around 15min. How? I just kept spamming Acid Fiends, got high enough cast rate, however even with 35k HP they were still dying in 1 sec. Their attack rating sucks, so they had huge problems to use Poison Flash while attack. Anyway done But 15min... screw it...
And as usual i gotta complain about roll - 6% spell damage out of 10 I've got used to this.