I am thinking about the typical Fat-Han with Expertise instead of Predator. Then you could change Luke with Gunner and save a point at the end.
Han (old). Expertise (instead of Predator), Evade title, C3PO, Gunner (instead of Luke), Engine Upgrade
Drawbacks I can see is that you sometimes intenionally want to reroll a hit result to trigger gunner, but it is not that much of a disadvantage to have the focus control instead of rerolling dice.
Other drawback is that Expertise does not work when you are stressed.
Advantages are: possibly more dice modifications, one point cheaper (when switching to Luke), better control (rerolls have still unknown outcome), fits better with Haks reroll because you still can modify 2 focus results instead of one by Luke
Thoughts?