So, I was doing some testing and it has come to my attention that the arcane ring might be bugged?

Here's what I noticed:
• proc is about as rare as a weapon proc which is a bit lame for a proc that only returns 2% mana
• when it procs, your right hand turns into a baby blue fireball
• proc does not work for auto attack, only for skills
• proc will only activate after the skill has hit a target and causes some damage

Is there a bug in the way it works? The current way is a bit lame. :/