Using this guys method doing the cheese will take longer (by a couple seconds like you said) just because of the fact you have to wait for people to become immune to the DoT. I saw a video that showed a longer way of doing this. You still have to wait the 30 seconds for the brand to be passed around and still have to decrease Dethsingers Power. The only thing you aren't doing is going to and from centre. I was saying that it probably isn't any easier because this encounter is already so damn easy that you'd be hard pressed to make it easier.