19-51 I use a very basic rotation and HQ mat combo.
40 Dura and 70, 80 but you can tweak on some 40 Dura



Careful Synth (in your case Careful Synth II)

Inner Quiet,
Steady Hand,
Waste Not
Standard touch x4
Careful Synth II


If you know you can complete a 40 with a single CS II

Inner Quiet,
Great Strides,
Steady Hand,
Waster Not,
Standard Touch x 4
Careful Synth II


For 70's and 80's I do the exact same thing because Careful Synth doesn't use CP and adding more to the end changes nothing.


Inner Quiet,
Steady Hand,
Waste Not,
Standard touch x 4
Careful Synth until I need one to complete. ToT where it lets me, ruminate and if I have durability, steady Hand More Standard Touch.


This system usually lets me craft between 88% and 100% quality, two levels above me.