There are no penalties for using pets or summons. It only counts if you are hidden at the time when the points are awarded, which is at the time of the creature's death.@Kyronix
Are Tamers or Mystics penalized for using pets or summons?
Could you PLEASE say more regarding this. For instance, if I'm surrounded by mobs and I invis/hide to get the agro off me and then continue killing, will that knock points off me for kills?
Or, are you targeting the stealth/tamer here, or what? Kindly give us a bit more info on the hiding.