I've got my prestige back up over 500, though my piety hovers around -200.
By the time it was all done, my prestige and my piety were both in the -500 range. Let my armies replenish, tried to reclaim Ulster county. I tried to win them back, lost miserably. His gluttonous, indulgent wastrel, only son (after his dad killed everyone else) took over, immediately losing 2 counties to a religious revolt.
