Best offset mount and red dot combo for AR?

What's the primary optic, what will you be using the offset to shoot at, have you ever run an offset before: so many questions.

My ARs with backup red dots sit on top, I much prefer lifting my head a bit over tilting the gun, changing my firing position, and learning a whole new trick. Add to that, the top-mounted red dot is easy peasy when wearing NODs, the 45, not so much.

Job picks the tool, and you have not been specific on the job.
 
What's the primary optic, what will you be using the offset to shoot at, have you ever run an offset before: so many questions.

My ARs with backup red dots sit on top, I much prefer lifting my head a bit over tilting the gun, changing my firing position, and learning a whole new trick. Add to that, the top-mounted red dot is easy peasy when wearing NODs, the 45, not so much.

Job picks the tool, and you have not been specific on the job.
Primary optic is vortex viper pst 2x10x32 basically using the offset for 25 to 50 yds
 
Another vote for the Arisaka...just went down this road and after a lot of internet surfing when with the Arisaka Defense Offset Optic Mount...but instead of a Holosun I am using a Vortex Defender XL and the set up is great. Good luck picking your perfect pair.