Blest wrote:
10% stones are better than 30% stones.
With 10% you have a lower chance of altering another attribute of your item when you fail etc etc.
But the assimilation rate can sometimes raise a stat, so it depends on how many stats that could benefit from an enhancement
Say for a clean npc wpn, I would use 30% stones first cause they can raise a stat that was 0% initially. Later on when I've got full blues, I'll use 10% stones more.