get the spell supernova and just keep hitting it, make sure you have a good darkness defense too, nothing above 75%. follow those steps and it is easy. in fact, i am honestly surprised to see this question as i have never had any trouble killing vampire lords thrice my level.
fight vath in dwarf hold
no
kistune
do his quests
Simple it is in yokai island
go to dwarfhold mountains
maybe its the first chaos lord?...
The armor is dropped by Wolfwing.
At the upper part of dawfhold. In Vath's Lair.:)
helm of the dark lord
do all the in quest stair way to haven, the beehive quest and do the dance after you beat the dancing guy, then go to mythsong and do all the quest, then join orchestra and do all his quest and then it will tell you where the secound chaos lord is.
the second lord of chaos are two twins that went to the chaos lord to pick the second go to the magic shop to find out more