Well there are a lot of folks around here complaining of wasted bandwidth all the time (for all text posts, too), and that technique would certainly help in that regard. Somewhat more seriously, Sulla was not much of a stickler on method, since execution of a citizen was rare in his day, and they crucified non-citizens, so I don't think that there were many skilled axemen then. I believe that most of the victims of the proscriptions were killed with daggers or the gladius, probably a few clubbings and suchlike too, I guess.