Forum:Broad difficulty

What are the guidelines (if any) for broad difficulty challenge information? On pages I've seen Dirtytabs (talk) 17:28, May 3, 2013 (UTC)
 * Quality and level, and percentages below (e.g. Climb up and start expounding)
 * Quality, arbitrarily chosen percentages (e.g. What does she know?)
 * Quality and level, no percentages (e.g. Note down descriptions of the visitors)
 * Narrow difficulty