chopping your throttle is a last ditch effort in my opinion, I have rarely ever chopped throttle in a rolling scissors! in a flat scissors I have and have done so regularly, but hardly ever have I in a rolling scissors... I want to keep all the E I can, so if I see myself losing on the 3-9 line advantage, I simply increase my arc until I have regained the advantage, although I seriously can not recall losing many rolling scissor fights....
I remember me and scotch in c202's in a fight over the runway, that lasted seemed like for ever, if I remember correctly I think one of use eventually augered, but the fight itself had several separate rolling scissors fights in it, each of us resetting it if one of us felt we were losing....
FLS gave the proper time when to exit a rolling scissors, and you simply need to rely on luck to not get hit while extending to try and reset the fight from a better advantage point
hope this helps ( Scotch did you save any of those films from like 2 years or so back? they would be great for this discussion)
edit: however, I do agree that a player should familiarize themselves with proper throttle management practice, it is a much needed skill in this game
TC