can someone explain why piece by piece is useful for the 3 star crafts?

[Billzey]

CZ>IQ>Ingenuity2>Waste Not>CSx6>CZ>SH2>Waste Not2>Hastyx4>SH2>Hastyx3>Manipulation>SH2>Hastyx2>SH2>Great Strides>(Innovation if 1ToTT)>Ingenuity 2(2 ToTT)>Byregot's>CS2


-- There is a little more to it than that, but its on a per craft basis...I'm sure you can figure it out if you try

This rotation looks terrible to me. Do you really only use 9 hasty touches, or is it dependent on good procs? 9 hasty touches, even if they all succeed, is not enough to HQ 3-star with NQ materials, and using all HQ materials is a waste of gil and unnecessary.