Your Chaos Plans?

And what is the most efficient way to do that?

My suggestion:
prepare the following plates:
Lv1 : 7 Opal or Silver
Lv2 : 12 Orihalcon or Amethyst
Lv3: 21 Steel or Sapphire
Lv4 : 81 Sapphire
Lv6: 388 Gold
Of course you can use lower level plates for levling up your professional, but lower level plate means more time will be spent on completing the event.
If you have the materials and do jewel crafting at 12AM, 8PM, 11PM(server time) everyday during the event, you will get dark angelic ring recipe as reward in 10 days.

Gold and topaz are interchangeable.

My stash is also exceeding the requirements significantly. Back when I purchased (and I basically bought up the market) you could probably get what you needed in Khaini for 1.5b. The ring will definitely go for max or more though.