In the decades I've been on this forum and others, it seems like those who do the best on Zix, use Zix alone, AND use the original version with no alcohol and no other added ingredients. HOWEVER, there have been far too many people reporting success while using both Zix AND minoxidil to exclude one of the other. Just don't mix them together. The rule most followed was to apply Zix first, wait 5 minutes, then apply minoxidil.
Don't try to re-invent the wheel, fellas. Adding this and that to Zix is not Zix. Most success I have read is by those using 120 ml of distilled water, 3 capsules of zinc sulphate, and 120-150 mgs of B6. That's it. If you want to use minoxidil with it, do like I mentioned above and apply it after Zix. If, however, you are very worried about zinc interfering with minoxidil (I think this concern is overblown) then simply apply one in the am and the other in the pm. Both Zix and minoxidil can be effective when used only once a day.
Try this for 6 months to a year and then reevaluate.