stickyfingers

Okay, so this is something that has been bothering me for a really long time, but when I finally went to go do some reasearch on it I couldn't find anything. Different classes/weapons deal damage depending on the on one of the specific units stats: tomes=magic, swords/lances/axes=strength, bows=skill. But how exactly does it work for dragonstones/manaketes? Specifically in FE13 but really any answers are appreciated.