Oracle
DruidThis is very far from finished. I'm really busy recently so I don't have a lot of time to play, and make videos, and also compose a complete guide. So please take this with a grain of salt.
Below are the basic information on Gear, Tree and Gems. Basically we stack enough cooldown recovery rate to make 0.5s cooldown of 
Lightning Bolt on 
Choir of the Storm to be reduced to below 0.2s (so at most 0.19s cooldown). I've tested a bit and seems like this is the threshold for the "loop" to be truely looping infinitely. The lower u can get the cooldown, the faster, and better it will be.
Math: Reduce 0.5s to 0.2s cooldown require 150% increased cooldown recovery rate, so we need at least 151% cdr total. Cooldown Recovery II gives 30%, so from tree, gear, we need 121%+ cdr for this setup to function.
There're obvious items like 
Sands of Silk, 
Crest of Ardura which gives massive amount of cdr, but they also take up item slot for potentially so much stronger items. The solution is 
Time-Lost Emerald with 3% cooldown per notable, 
Grip of Kulemak with up to 14% cdr for you and allies, and 
Heart of the Well with up to 18% cdr.
