If you're not using Mom's SHII + Hasty touch method, you're not crafting to your maximum HQ potential.
SHII+Hasty Touch+Tricks of Trade+ Manipulation is the best means to consistently get your HQ% up.
You finish the synth with SHII + Great Strides + Innovation + Ingenuity + Byregots Blessing + Synthesis Actions
This is ESPECIALLY applicable in HQ'ing 40/40 synths with NQ mats.
Anyone who says Hasty touch is no good probably does not have SHII. Hasty touch cannot be consistently beneficial to RNG unless it is functioning at 80%, that 10% makes a HUGE difference for HQ2star synthesis
Here is Mom's guide:
http://www.reddit.com/r/ffxiv/comments/1mh6um/