Here is a fanart of Path of Exile's Arachnamagus Helmet concept made by Qingyi Li.
I mixed up different proposition she made to create my own version of this helmet. I tried to stay very low in polygons to fit HnS requirement (but still did some 4k textures). This work took me about 15 hours without rendering and I'm actually satisfied with what I've done.
Hope you'll enjoy it !
Actual Reference :
https://www.artstation.com/artwork/Ge0Ewa