Different nodes can give a bonus too, and you have abilities to increase your hq chance, if you get the 5% node bonus, and use your abilities, you can get up to 50% hq rate. Now I know you will say something about that the node is one out of four, and gp takes time to regen, or that if you use your abilities on hq, then you can't use them to increase yield, well it comes down to decision, quantity or quality, heaven help us that they designed a system that let's us choose.