Again, we're both drawing this up in our heads but to me you're gonna get more space for Luke if you're running Josh on the flat 7 at the top than you will with Trevon running the bait out of combo which is kinda what I'm thinking.
If you're running "China" do you want Luke at the Z then? That's gonna put less stress on the safety than it would if you have Trevon there (Down the road, James Frenchie). For me, I want something quicker if it's Luke. Go diagonal and do a couple different things: Draw him inside to sell a screen (Which kills the LB) and work him back or I get him on an outside release to give Brandon the quick read. Or I get the CB to pinch down and go to the 7. And you can do both off of playaction, which is great for us.
The only question I have is are we really going to Flex him? Will that hurt our running game or help? I am pro having Ford and Barker on the field. I am even pro flexing both of them on the same side of the field. You wanna sell a screen; throw Barker, Ford, and Trevon/Cumby in a bunch 3x1 with Bhebhe backside. Call 3 plays: Bubble, Inside Zone, or if you love the match-up you draw with Bhebhe go there. I'm going on a tangent.
To finally answer your question: I don't hate Ford anywhere and I don't think there is a wrong answer. But if I have to answer I think I like him most in the #2 spot. Each spot draws a new question the defense would have to answer and we haven't even switched concepts.