Does teleporting provoke an opportunity attack? If not then a cool tactic that came to mind was a charge and then a teleport in order to attack and then disengage right away. This causes the PC to either move to engage the target, which if the PC fails to kill could then just teleport away again, or would have have to just ignore it and take the dammage with no retaliation, and leaving the PC open to more hit and run.
Sort of like: charge attack, port away, charge attack, port away, etc. or charge attack, port away, PC engages, attack, port away, PC engages, attack, port away, etc.