It's worth noticing that even before acquisition of Byregot's Blessing, you can still create an IQ stack and do a finishing move.
You can use Waste Not to buy more touches, and use Hasty Touches to save your CP. After IQ is higher, then in your final phase, use Great Strides in conjunction with a Standard Touch or Advanced Touch. It will usually give you a very nice increase of quality in the end.

For 70 durab items, you may use Basic Syn on Normal Conditions, while baiting for more Good conditions before you touch. So, something like:

Inner Quiet
Steady Hand
Waste Not
Hasty Touch (normal condition - just to build up IQ)
Trick of Trade (Good condition - gain 20 CP)
Basic Synthesis (normal condition)
Hasty Touch (Good condition - 1.5x quality)
Steady Hand
Waste Not
Basic Synthesis (normal condition)
Hasty Touch (Good condition - 1.5x quality)
Basic Synthesis (normal condition)
Hasty Touch (normal condition)

Steady Hand
Basic Touch
Standard Touch
Great Strides
Standard Touch (final blow at high IQ stack)
Basic Synthesis (completion)

The above is just one way to do things. There are sooo many other ways. If you found 3 synthesis gives you progress that is just a little shy from completion, you can try fit an Ingenuity in the final phase like the following:
Steady Hand
Ingenuity
Great Strides
Standard Touch
Basic Synthesis
Basic Synthesis

Then the final touch may gain more quality, and the two Basic Syn will give more progress than your usual Basic Syn alone. In this case, you may remove up to 2 Basic Syn in your IQ-build-up phase, and put in 2 Hasty Touches instead to further boost IQ.

If your quality is still far from enough after your final phase, you can even try Rumination after your final Standard Touch, see how much CP you can squeeze out to push even more quality. Although, without IQ stack, your touches will be a lot less powerful at that point. But if you have like 10 durab, you may still gamble with a Waste Not, Hasty Touch and then Basic Syn to complete it.

Don't start copying people's macros too early. I suggest you play around with level 15 cross class skills more and develop your own rotations first.