AFAIK only DL low award space would be available for AZ miles. Try searching on the DL website for each segment to attempt to piece together, paying attention only to flights that are available for low miles.

Most of the flights to/from Florida will be domestic FC not business, so if you are asking AZ for business class this might be part of the problem. It's a different inventory code, although the seating and service are indistinguishable.