When it comes to setting up scopes/rings/heights/etc. I've learned one important thing over the years..
Our setups are not created equal. A big factor is actually the shape of people's heads..
While some people have bigger/lower cheeks and a farther distance to their eyes,
other people [like me] have thinner/higher cheeks and closer distance to our eyes..
That said, 1 the height of the top of the stock in relation to the scope rail is a factor
and then 2 the shape/type of your head..
With the rifle you mentioned, I would personally need to go with either a short or a medium height ring set.
Same setup w/ my Nova Freedom, Hatsan Gladius, Kral Puncher Breaker, and Kral Nemesis,
In YOUR case, The nice thing is - if you go with a higher set of rings - you can always adjust your rifle's cheek-piece.
That'll give you a much nicer weld / level line of sight.
Sam -
PS: Killer rifle! I really dig those Vulcans, and hope to get one of them someday!