Game Design 7 days is too long for annhiliation

7 days is simply ridiculous considering now the delay right now is around 12 hours and annhiliation mythic prices are still sky-high (7 stx for a trance, more than idol, 26 stx for hanafubuki). Making it something like once a day or once every 3 days with increased rewards would make it so people who would have missed the 7d one can get at least some of the rewards that week along with making the mythics more common.