As the guitar has only one bridge pickup I would strongly recommend Miracle Man bridge, it`s hi gain pickup well suited for brighter guitars
Despite being hot ceramic pickup it does many things really well, good enough on cleans, truly amazing on leads and equally amazing on rhythm work too.
It`s my favorite BKP pup to that point that I have it in 2 guitars.
Ragnarok seems to be beefed up MM I suppose, but only guessing.