The Arizona Republic endorsed Doug Ducey for governor a few days ago, which is perhaps the best argument I've heard for supporting Christine Jones. Unfortunately, it's also pretty much the only argument, so I'll continue to go with Ducey and assign the paper's endorsement to the 'broken clock' category.
Actually, the Rep's endorsement is only the second-best reason for supporting Jones (or any of the other candidates except Andrew Thomas) -- Joe Arpaio has also endorsed Ducey, which for me would normally be pretty much the kiss of death. However, one of the best things about Ducey is that he seems to be capable of attracting support from both the Tea Party and Establishment wings of the Republican Party, which is an important quality; another example (besides in-state endorsements ranging from Arpaio on the Tea Party side to the Establishment's Republic) is that his outside endorsements include both Ted Cruz and Scott Walker.
So I suggest that people vote for Ducey, unless voters go nutso and Thomas starts looking like he has a chance. This so far, thankfully, hasn't happened -- he's in the low single digits in every poll I've seen, as even the farthest of the far right seems to be fed up with him, or at least to recognize that he can't win. If, however, Thomas starts to gain support as primary day nears, still a possibility with a lot of the electorate undecided, then I suggest voting for whichever candidate seems most likely to stop him (which is still probably Ducey).