Swift Hunter

 
Prerequisite(s): Skirmish +1d6/+1 AC, Favored Enemy
 
Benefit: Your ranger and scout levels stack for the purposes of determining the extra damage and bonus to aC granted when skirmishing. Your ranger and scout levels also stack for the purpose of determining when you select additional favored enemies. In addition, your skirmish extra damage applies agaist any creature that you have as a favored enemy, even if it is normally immune to extra damage from skirmish attacks.
 
Source: Complete Scoundrel