We all know the monastery was the spot, but with taht shutting down in 32 hours, time to consider the next best spots:

I know pre Dinardo the highlands were the spot (for light).. But now there are several new spots, and I know the factory seems best for fire... Got a crazy run with 6 fire megacrysts once, thats not a thing that ever happened in Zadehl or the Forge, probably is impossible.

My theory is each area has one high drop rate mega, and one or two low droprate megas. Exceptions being the final area of each island, which can usually drop them all. (And first island which has no megas).

So far i'd guess:

Phantom Forest: High: Lightning, Low: Dark Zadehl: High : Earth, low: Fire Maranda: High: Water, Low: Wind and Ice

That, plus the 5 node areas aren't necessarily better than the 3 node areas. As the 3 node areas drop from 4-10 items per node, while the 5 ones can drop 2-7.

And yea with our accelerated updates, we may get those Ruler rings sooner than later, so worth getting ready.