I think my first comment got flagged for including a link, so let's try this again haha. There's also a ring that gives 2 copies of this, Gorgon's Petrified Band. So if you wanted, you could have your cake and eat it too by farming that and still getting to use the Nefarious Staff. I could even see other classes choosing to use it, mostly as a wall but also because the summon can do a surprising amount of damage.
I think my first comment got flagged for including a link, so let's try this again haha.
There's also a ring that gives 2 copies of this, Gorgon's Petrified Band. So if you wanted, you could have your cake and eat it too by farming that and still getting to use the Nefarious Staff. I could even see other classes choosing to use it, mostly as a wall but also because the summon can do a surprising amount of damage.