I got lucky because I looted an arcane fossil from only 10 planar arena chests, but I don't know what to buy. Here is what I got:

Lepre
Nightshade with AA of magma (egg slot)
Underhul set from glintstone event

Should I buy hexblast staff or get a lvl 56 weapon?
Here is screenshot of my character:Name: Arcanelegends05.jpg Views: 893 Size: 365.7 KB