that ring is one of the best, if not the best, token-less arcane item in my view. Has decent synergy with quite a few builds too. 5 is decent range wise. The higher range this spell has, the higher dps is capable of doing. Being able to target enemies when they are 6 or even 8 spaces away would be pretty insane. They won't be able to get near you (or important positions near you) without taking huge amounts of damage. I love casting it on elf mages before sending a warrior after them. Super effective.