weird OHK in RA.

I was running my Dervish using vital boon to boost health, had avatar of lyssa out for extra damage.

Match starts out I see a necromancer in the background and no healers on the team, so I race towards him thinking it be a quick kill...not realizing how right I was. Already had vital boon/lyssa on, the guy was at full health I'm 99% sure when I started my attack, opened with chilling victory and BAM I don't know the damage or anything, but he dropped on that hit, and saw no animation of any spell hitting him. He was even going WTF and laughing at what happend.

He was trying to do a 55 build or something. Nothing special, just noob pwning.

Maybe, though he took a bit longer to kill next time I fought him that match after he was raised.

Maybe you pulled off a critical hit?