Joining a union or having a lot of active friends added can improve your chances of someone joining your raid when you send out a support request.

I think there was a raid support request thread or something at one point on this forum.
People are much more willing to join Sandal raids compared to Jormun simply because there are more people who can solo them with the exception of players who just recently joined the game or players who have terrible luck pulling Wind himes.

But if you'd like I'd be willing to help as well.
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