This is my 1st TOPIC ... So dont be rude ::)
For example... You are a archer...
1st. Use a skill on a plyer ( for example STUN Shot )
2nd.During the stun shot Switch fast target on a NPC ( pressing CTRL that NPC )
3rd. You will see that you are attacking the NPC.
4th. Sometimes the NPC dies... (because admin put low hp :P ) so dont worry if it dies... It will respawn.
I dont know If this was before... But I wanted to share you .. Cheers :D