Our clinics apoproach would have been to include C4-7 as a motion segment and if double diagnostic paradigm positiv eper ISIS guidelines then we would RF. If either MBB failed, we would proceed to C3, C4, TON MBB. Failing this the options include CESI (worth trying but of low clinical utility for pain described), manipulation under anesthesia (no good peer reviewed literature, but very little downside), AA/AO blocks.
Cervical discogram and possible perc disc procedures could be entertained. I do not care for either, but when PAZ reads this he'll ref Slipman's C-disc article, and others that support C-disc and interventions to the C-disc. My bias is go watch a NS do an ACDF and then it would be fairly easy to convince a patient that this may be the best course of treatment. They work well and are not that complicated. (Unless I got stuck watching great NS on easy necks- I think it is a reasonable thing to do before intradiscal procedures in the C-spine).