Actually, the situation I meant was if the RIGHT engine was out. You're right, normally (as normal as single engine ops get) you 'step on the good engine'...real important for non-centerline thrust A/C as you know.
What he was telling me was totally opposite....using right rudder with a dead right engine. It had something to do with the torque of a full thrust left engine (prop rotating right, causing the engine-and thereby the aircraft, to try to bank left) overcoming the thrust vector (which would normally cause the aircraft to yaw right). It wasn't a problem if the left engine was out, because both props rotated the same way (not contra rotating)...so the torque would add to the thrust vector, therefore 'stepping on the good engine' works like you think it would.
The non-natural input would only be necessary at full power on the left engine from what I understand. So single engine, while coming down the wire, you could be using left rudder as you think you should, but then would have to put in RIGHT rudder if you had to do a wave off.... Freaky man!
FastCargo