I'd allow it with things like mooks.
Well, since mooks don't take consequences, you'd only need a Weapon:4 or so to ensure a Taken Out on every hit against humans or others without Toughness powers. Though doing a teleport-as-evocation-attack effect would probably require some weird Sponsored Magic... and I might require some extra shifts, honestly (EDIT: if the teleport could be a "useful" effect and not just "get out of this scene!")
Weapon ratings (IMO) can be used as a more general sort of "power" -- not necessarily deadliness as such. An immobilizing or teleporting spell could still have a high Weapon rating, even if it doesn't kill -- it's still highly effective at getting a Taken Out result, thus high Weapon rating.
If you DID use the teleport-elsewhere spell against non-mooks, and consequences resulted, you could still explain it as the target trying to dodge the spell, falls over wrong and gets bruised up. Or it could mess up, teleport them only a few feet, but into an awkward position where they break a limb. (Though it might be simpler to try to limit it to use against mooks, yeah.)
EDIT:
Warp Portal
Type: Outsider Magic evocation, attack
Power: 6 shifts
Target: One target
Opposed by: Target's Athletics
Effect: Weapon:6 physical attack. If this Takes Out the target, they're teleported to a random spot within a mile or so - but always well out of the current scene.
Variations: If your game allows mental evocations, this could be a mental attack opposed by Discipline.