LamppostInWinter

I've been working on editing what abilities enemy creatures have, so far to no avail, e.g., changing the Venatori Mage's Fire Escape ability to a Cold Escape, or to something completely different. Tried several avenues of approach, including editing the ability list in Character Blueprint (under creatures), the network registry of the creature (under prefabs), or just replacing the ability files themselves, as well as combinations of these approaches. Results vary from crashing the game whenever the affected creature loads, to the creature not performing the original ability. Anybody have any ideas?