Not enough new tech involved! Consider getting a Searzall to solve that problem: http://www.bookeranddax.com/searzall/
I feel the Searzall works better for things like melting cheese, lightly toasting bread, or otherwise browning things without too much heat.
edit: wait a minute, it seems that Searzall is basically just an addon to a normal blowtorch. So if you just take off the "Searzall" addon, you are left with a normal blowtorch. (Or am I misunderstanding something here? Please confirm!)
For steaks, I prefer to get oil very hot in a cast iron, then put the steak in the cast iron, while torching each side for 30-45 seconds. (Also got that off a Kenji article.)