All synths were performed using HQ mats when possible. I've been using Master's Forge lately, seems to be helping out a bit on harder synths. After going 3/8 on Zicorn Rings today (4 busts being 86%+ >> 4X%DD) and cursing like a pirate, I HQed a pair of avengers lol, had to bareback rapid @ 99% but it's all good XD. Btw Flawless parts counts as NQ in HD synths, so all synths starts at a little below 350Q.

OK seriously, atm I do not have sufficent data to form any sort of reasonable hypothesis on HD crafting. Also I am not a fan of relying on destabilization -- way too random and HD final synths is a brickwall fest -- breaking all the way towards completion.