Bill,
You can't put in an EOI at 90 points, it will be refused. If your wife can also get some kind of skilled offer of employment, that will give you an extra 10 points, taking you to the passmark.

Your only other option would be to work in skilled employment in New Zealand for longer than 12 months, which would also add 10 points to your score. Only problem with that is the ever changing points!