If its misleading it's only because the post he was quoting was misleading. Obviously you have to build up focus to do any of this and that will get your juyo to 5 stacks.
Why would you use leg slash to apply a overload saber?
Force leap/OS in air - > zealous strike -> cauterize -> merc slash -> if you want to be mean add zen at start and put them in stasis at this point or slash or MS.
It would take two or more "combat burst" to do the same damage.