Five blogs with Moz PA35 or above AND majestic TF5 or above. Each tumblr blog will be registered to a unique email address and will have BOTH moz PA35 or above as well as majestic trust flow 5 or above.
When you have both majestic and moz metrics higher than average that greatly increases the chances of the blog being of higher quality. Think about it. If a blog has low moz metrics and high majestic metrics it's good. If a blog has low majestic metrics and high moz metrics it's good. But with both recognizing the blog as highly relevent that would be even better, right?
This logic is what the gig is based upon.