The spiritualist's phantom can't weild weapons and it's slam damage scales with basically nothing but damage dice, meaning it's damage ends up trivial.
You can't wear items in the same slots as it, so it can't get any of the star buff items unless you give them up.
In etherial form, it can basically do nothing but deliver touch attacks, something that is a novelty at best as there are spells or abilities on other classes that simply deliver touch attacks better.
I'm not seeing anything a spiritualist does that another class doesn't do better in every way.
Thier companion is so bad that I'm pretty sure you could do better with a familiar, and I'm rather certain almost every 6 level spellcasting class casts better then them.
So what I want to know is-
Is there anything a spiritualist actually does well, or is it as garbage as it seems?