Looking for Mythic Shriek Guild collaboration

My guild, the Salty Sea dogs is 10/10 Normal for Castle Natharia, 1/10 Heroic (will get more next week) but I think we could easily do Mythic Shreikwing, but our guild doesn’t have enough geared members.
I was hoping to collaborate with another guild, each have 10 members or so (20 required for mythic). My blizzard name is alucard#1421 please PM me if you wanna talk about it. Our guild usually meets on tuesdays 530pm pst and Sundays 1030am pst. Any time near then would work. Thanks!