I managed to drag DS1 out for a couple of raids, this afternoon, and bagged myself a shiny Ray, at last. I've not been on these threads much and see a lot of new faces so my advice to lower levels players doing rayquaza raids is to evolve as many high level glaceon and cloysters as possible. Any with 2 or 3 bar ice charge moves like avalanche will fill your team out nicely. Mamoswine with avalanche is best but they're harder to come by.