User-agent: Googlebot
Crawl-delay: 90 

Disallow: /tag*
Disallow: /reembed/
Disallow: /index.php* 
User-agent: BingBot
Crawl-delay: 30
Disallow: /tag*
Disallow: /reembed/
Disallow: /index.php* 
User-agent: *
Crawl-delay: 50
Disallow: /tag*
Disallow: /reembed/
Disallow: /index.php*