I had a quick look, your cast speed is very low, and your Spriggan is converted to cold while everything else is physical.
oh oops. I was kind of autopilot doing that based on the frostbite thing discussed above. But yeah gathering storms is already converted to phys. And yeah got to get cast speed in there.
EDIT: Also how did I not think of this sooner? The build is called “Spelling Bee.”
EDIT: The build seems bad. Pretty low damage even stacking a lot of attunement and it’s not even THAT tanky. Like it’s not completely falling over yet, but I see my health bouncing up and down constantly and it has died to some random stuff. If it’s going this slow at 100 corruption no way I’m even gonna farm enough to get it to the point where it might be good.