Zero hit the nail on the head. Go straight Machamp, but I'd tech in a 1-1 line of Donphan Prime in my deck if I ran Machamp to OHKO Luxray GL LV.X.
4-2-3-1 Machamp SF-Machamp LV.X
4x Unown R LA
1-1 Donphan Prime
2x Uxie LA
Plus, if you want to run other techs, (Machamp can use DCE, and so can others), don't hesitate to test 'em out. That's the skeleton of my Machamp line, but some don't run the LV.X.