Summoner Emblem (+15% damage)
Papyrus Scarab (+15% damage, +1 minion, +knockback)
Hercules Beetle (+15% damage, +knockback)
Necromantic Scroll (+10% damage, +1 minion)
After that I'm still debating about the last slot(s):
Celestial Shell - Obviously an all-purpose accessory that anyone can...