User-agent: Twitterbot
Disallow: *
Allow: /wp-content/uploads/*

User-agent: Googlebot
Disallow: /wp-content/uploads/
Disallow: /wp-admin/
Disallow: /imager/
Disallow: /img/
Allow: /wp-admin/admin-ajax.php

User-agent: *
Disallow: /?blackhole