Chances are that you're not going to get enough heat from an oven to cause the Maillard reactions to happen before the steak dries out - the conductivity of the air just isn't high enough.
If you're worried about a blowtorch, though, you can sear the steak just as effectively in a very hot frying pan.
If you're worried about a blowtorch, though, you can sear the steak just as effectively in a very hot frying pan.