Hello, I was playing a skirmish when i found that a Darkmarsh Snatcher could not harm a Colossal Boa. Seems that bonus damage is not taken in account before "Colossal" and "Resilient".
Should be related to this bug I posted: http://forums.poxnora.com/index.php?threads/flanking-applied-after-attack-not-to-dmg.11896/