Since this is an RNG question, it belongs in a different thread, but I'll just reply here and save us both the time of posting elsewhere, XD.
Anyways: If you're using shiny egg finder, then that's the fastest way. I thought you 'just' wanted to breed a synchronizer, in which case using the old method is fine. If you're breeding for shiny/nature/ability though, you're doing it the fastest way imo.