Nightforce or Farrell is what I've always used, usually the u/l aluminum models.
The height can depend on the barrel and the height of your pic rail. I just mounted one of those scopes on a 6.5 prc with a Rem Varmint barrel and used the .885 tall. The rubber scope cover just fits underneath it.
EDTA: Correction. I used the 1" tall rings for the 56mm scope. I used the .885 for a 50mm model on another rifle.
Head to your local gunsmith, that scope has a huge turret
we had ejection problems and had to trial and error many different types before I finally went with a gunsmith