Our tack team ran both NXS 3-15 and gen II razor 3-18 on sniper rifles. I have a 4.5-14x50 mk4 on my mk12 build. If I had to choose, I'd run a Steiner T5xi 5-25!
Our tact team used Nightforce NXS. 3-15. And Razor gen 2 3-18! You might be able to get a used vx6hd or vx5hd for around $800 and I have not heard a negative on either