I didn't like the Urgash's will. I doubt I'll ever wear it.

I upgraded it to level 2, and I think Nastya used it on one map. It's red and stands out.

Yesterday, I completed the 3rd scenario from the Sanctuary campaign. I gave Irina "Mournful Song," which gives +10% to Light, then bought artifacts from the market: a cloak that reduces spell costs by 50% and a ring that increases elemental summoning by 20%, and learned the Light Elemental summoning spell.
I traveled the entire map with snow maidens and summoning light elementals. At first, she summoned 11, and by the end, around 25.
By the end of the map, the staff was upgraded to level 3.