to be fair. I hunted snowman every day for a month or so, at least one cycle through the maps if not 3-4 some with rep 2x drop some without and never got a chaos scroll.
I hunted in the minidungeon of the ant tunnel for 3 nubs worth of 15-35ish and never got a chaos scroll
I hunted cube slimes on my hermit from 45ish to 47ish and never got a chaos scroll.
I have like antichaos scroll karma. So you all can just bite me XD