The Spider Queen from Arachyr DOES work with Zuni pet damage bonus. She does pretty good damage too, not as much as the gargs, but more than fetishes or dogs. What it does that I like is it also slows significantly. It's a fun way to proc Bane of the Trapped from a distance still.
It shreds on t8 for me right now and I have absolutely terrible gear this season so far. I have no idea if it's viable for anything else but it was a fun experiment. As I get better gear and optimize more for it I might try to keep it in the mix. We'll see.
Has anyone tried a Zuni and Arachyr combo? I'm wondering if the 6 pc pet damage bonus from zuni works with the spider from 2 pc arachyr. If the two even work together at all or if the bonus would be significant at all. It would make for a cool hybrid if you could do a spider zuni build if the damage was at all worth it compared to what you'd have to give up to make it work. I've seen Hell Tooth Zuni hybrid builds but I was thinking the spider would be more interesting if the pet damage synergized.