From Ramza:
foot, left, right
hand, left, right
weapon (for heroes)
chest, left, right
origin (mostly on feet like auras)
overhead (doesnt rotate with head)
head (rotates together with head)
sprite first, second, third (for buildings and blood mage)
rear, and more sprites etc)
weapon (for heroes)
sprite (for buildings)
medium (for buildings)
large (for buildings)
Attachment Point Modifiers:
left
right
mount (for mounted units)
rear (for quadrupeds)
first (for buildings)
second (for buildings)
third (for buildings)
fourth (for buildings)
fifth (for buildings)
sixth (for buildings)
rally point (for buildings)