The Superior scrimshaws of aggression/corruption has, as far as I can gather, never worked properly. When active, the time between proccing seems way out of sync with their non-superior counterparts. This results in long times out of combat, as the next monster doesn't become aggressive for quite a while after killing the previous one, often long enough that you leave combat and heal through regen. As far as I'm concerned, I've just wasted 250k tokens.
I've reported this as a bug, and written about it on reddit. Nothing. 8 months of it not working.