Without a sweat? Excuse me?
I killed him on normal with my Conjurer by running around and resummoning pets because they die in seconds.
Not due to Callagadra, he could not damage them that much, nor me… but those damn sandstorms (the big ones, not the small ones) that race around him are ridiculously bugged. They bring down health if you stay in them to zero in miliseconds. And it is hard not to stay in them since there are like 3 whirling around and they seek you and your pets out. I am wondering if this is as intended, because I found other whirlwinds in the desert and they did not do this much damage. Despite my and my pet’s resistances being basically maxed. I dunno what sort of damage those do, maybe % life? I assume it is like, 50% of life (halving your max life every second) or something…
The rare few seconds I managed to get Callagadra away from the sandstorms, my pets stood their ground well against attacks…