http://pso2.jp/players/support/measures/?id=4387
Meteor Cudgel itself isn't being nerfed, but there will limit placed on the number of whirlwinds you can have going at once (presumably they will still build gear).
Elysion's latent will be nerfed.
Additionally, the custom technics that will be nerfed in October are Ice Fang Nabarta and Umbral Namegid (the ones that boost damage).
The fact that they aren't touching fire technics shows they continue to have no grasp on the current balance...
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