Druids and clickies

[sacman08]

Serious question here. Saw again in a thread talking about charm kiting that its great to have the Goblin Gazughi Ring and it sorta of baffles me. Yes it's IvsA insta cast mana free but you are only saving 30 mana and 3 seconds. Why does that make it so desirable? Compare it to the Luminescent Staff (which has obvious advantages for quading) the ring trades for more plat. What gives?