I normally do not like teleporters at all except as major villains or conveyance NPCs. Wayfarer did a decent job of being judicious with his abilities. I particularly enjoyed when you moved Aaron to the otherside of that barrier and realized, a moment later, that you couldn't bring him back without being able to see him and you'd have to go across yourself.
Did you have Speeding Bullet on your teleportation, to prevent things resisting the effect?