Perception to 320. and GP to 550 is the base you want to be able to get at least 1 HQ 100% of the time with sharp vision 3 and deep Vigor. After that you want to get gathering high enough to where you can hit 100% by using sharp vision 2. Which is around 320 I believe. With this you can use Unearth to reach 11% HQ chance. which will most likely yield better results than just stacking perception. Even at 350 perception its still only 1% HQ rate.