I'm currently aiming for the DMG +9, Additional Effect: Weakens Defense +10 augments. Currently on Trial 125 (any monster x100 on Earthsday or Earth Weather). Earthsday is easy (just walk out of Whitegate and go to town), but Earth weather has been disappointing. Tried Quicksand Caves over the weekend and no sandstorms of any kind. Bad luck, I guess. I am curious about the frequency of Earth weather in Batallia Downs [S], especially since I'll need Arcana for the next trial anyway.
For those looking for rain in 116, I'd say Crawler's Nest is the best area for Crawlers since you can walk back to Jeuno for new weather reports and Hot Spells are rare in the area. Boyahda is an option, but rain is not nearly as common as thunder/thunderstorms.
Hayward: San d'Orian Elvaan Male. Cerberus Server.
*Current Project: TBD* SMN