I have only beaten the Countess so far in MP but of all the bosses I've faced King Leoric was the most rigged.
Might + Extra Strong + Sanctuary + Bone Spear + Extra Fast + Amplify Damage and probably some other things I didn't read because I had to run for my life constantly. Finally downed him with level 1 Psychic Hammer
Griswold felt like a kitten in comparison.
Can't wait to face the other bosses in this mod. Consider this my introduction I suppose I've been lurking here for about a week now
Probably gonna remake my assassin after experiencing the wondrous smack downs this mod lays on its' players.
See you on the realm,
TranquilChaos