HTTP Slow Post and IIS settings to prevent

So we got this report from a Security Company saying our MVC website running on IIS 8.0 was vulnerable to slow HTTP post DoS attack. The report stated we should

• Limit request attributes is through the element, specifically the maxAllowedContentLength, maxQueryString, and maxUrl attributes.
• Set to configure the type and size of header your web server will accept.
• Tune the connectionTimeout,
  headerWaitTimeout, and minBytesPerSecond attributes of the
  and elements to minimize the impact of slow HTTP attacks.

The trouble is I'm having a hard time finding any recommendations on how these values should be set. Eg. the minBytesPerSecond is default 240, but what should it be to prevent SlowHTTPPost attacks?

Cheers Jens