i would suggest neither of the above as reparallaxing will possibly muck up top end ranges. And i have never seen a close up adapter(im not saying there isnt one just not seen anyone have one)
i have one and just shoot it blurred as i shoot at 50x and never mag down setting up top turret on my 55yd mark
But this also depends on how high your mounts are too. Im shooting a s400 with my nikko on top.
If im shooting at a reducer at that range aim top of kill. (but if you see my scores maybe my advice shouldnt be used)
Really learn your scope and its forboyles guess that if it doesnt focus it must be 8-10 yrd
As each scope has a niggle we are never gonna have it perfect.