Been a while since I’ve poked around at anything that would show this properly, but do we know if the AI is still targeting AoE effects at character center of mass, or ground targeting them?
A subtle difference, yes, but when a spherical effect is center-of-mass targeted, that puts it’s center off the ground, so the effect circle that’s drawn on the ground is smaller than what the player experiences.
(and if you are tinkering with targeting, you might look into having the AI use splash damage to hit players that are hiding around corners, but that’s more a feature request. Getting AI to fight on the same playing field us players use, by giving them ground-targeting so that AoE circles draw consistently for players and AIs, bugfix).