Not all Rathma Builds use Shadowhook. I'm not sure what curses you're talking about. Most Rathma builds use NO curses because every skill slot is used by a pet skill. Rathma technically is "short" 1 skill slot because a lot of builds should have Army of the Dead but it just can't fit unless you discard a needed skill. Unfortunately, most builds don't run Army of the Dead because of this.
Some Rathma builds use Cycle in cubed as well.
Not a single solid Rathma build runs Army of the Dead and runs Decrepify - Dizzying Curse (heck, any necro build should run Decrepify with the sheer toughness boost you get from Dayntee). It's just plainly easier to not rely on a high cooldown skill.
You get way more damage from using Simulacrum with Reilena, combine that with the extra essence you get (and yes, that is definitely a big factor) from using Bone Spikes and it's a no brainer. No essence means no mages means no damage. Try running the build without it and you'll be starving for essence even more than ever.
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Not all Rathma Builds use Shadowhook. I'm not sure what curses you're talking about. Most Rathma builds use NO curses because every skill slot is used by a pet skill. Rathma technically is "short" 1 skill slot because a lot of builds should have Army of the Dead but it just can't fit unless you discard a needed skill. Unfortunately, most builds don't run Army of the Dead because of this.
Some Rathma builds use Cycle in cubed as well.
Not a single solid Rathma build runs Army of the Dead and runs Decrepify - Dizzying Curse (heck, any necro build should run Decrepify with the sheer toughness boost you get from Dayntee). It's just plainly easier to not rely on a high cooldown skill.
You get way more damage from using Simulacrum with Reilena, combine that with the extra essence you get (and yes, that is definitely a big factor) from using Bone Spikes and it's a no brainer. No essence means no mages means no damage. Try running the build without it and you'll be starving for essence even more than ever.