I found several problems with bosses, but most were minor. They will all be fixed in the next PEQ SVN dump. In the meantime, you can fix your bosses using this query:
Code:
update npc_types set level = 64, hp = 13728, mindmg = 114, maxdmg = 458, mr = 60, cr = 60, fr = 60, pr = 60, dr = 60, Corrup = 60, ac = 1000, str = 300, sta = 300, agi = 300, dex = 250, wis = 250, _int = 150, cha = 150, attack_speed = -18 where level = 16 and name in ('#Yavrin.pl','#Ulyist_Son_of_Night','#The_Keeper_of_Blood','#Sikl_the_Manslayer','#Prince_Jerranad','#Lokta_Ancient_Giddib','#Charaex_the_Mastodon','#Bial_the_Blade');