Why do you fail at Hashmal?

[Alestorm]

The most common reason is it is a positioning fight. Since there is a level of RNG for where the pillars drop and what half of the map will be instant death when he does his dash; you can't learn the mechanics as easily as the other bosses. That and all the havoc people also are out of place when the orbs spawn and are afraid to run through the bleeds to get where thy're needed.

[Lord_Zlatan]

The most common reason is it is a positioning fight. Since there is a level of RNG for where the pillars drop and what half of the map will be instant death when he does his dash; you can't learn the mechanics as easily as the other bosses. That and all the havoc people also are out of place when the orbs spawn and are afraid to run through the bleeds to get where thy're needed.

This is odd (i totally agree with you) but its odd because SE has driven home the idea on countless times that if you stand in an AoE your dead. It was like back in the day when Garuda Ex spawned 3 tornadoes... there was a short period where u could run through them without taking damage, and people never seemed to want to run through them (in the DF runs that I did way back when) out of fear of dying and causing a wipe.