If you crit with a spell of the same element as your draconic bloodline's, does it double the extra damage as well? Ex. A L. 20 Silver/White Dragon Sorc crits with Polar Ray. +40 (instead of +20) dmg ftw?
I looked at the CB, all it says about critical exceptions is:
Exception: Precision damage (such as from a rogue’s
sneak attack class feature) and additional damage dice
from special weapon qualities (such as flaming) are not
multiplied when you score a critical hit.
I don't think it would count as either precision damage (which wasn't really defined anywhere) or 'special weapon quality.'
Thanks,
K