I'm trying to figure out if with my current miles, I'm close to being able to get my family of 4 (including myself) from the US, to Australia and back.

I've spent the last hour looking at airline reward charts and writing down all the miles I have and I'm stuck.

This would be for about a year from now, so my miles will grow for Chase and likely American as I fly AA for work every couple of months.

I have 111,000 Chase Ultimate Rewards points (good for United, BA, Virgin, Singapore).

I also have 40,500 United points. United one way cost from US to AU is 40k. So I'm only short by about 9k to getting us all there. I'll easily rack up another 9k Ultimate Rewards points.

Coming home we can split up into pairs, one parent with each kid.

So in addition to the above, I also have:
AA - 33,000
Wife AA - 40,000 (40k credit card bonus. Told her to use my freq flyer # but she didn't listen . Not sure that would have worked actually).
Delta - 77,000 (50k credit card bonus)

If I could combine my wife and my AA miles, that would get close to getting two of us back (AA cost one way per person is 37.5k) and I will probably add another 20k AA miles to my account before next winter. I could also get a credit card that offers bonus miles (which is how I got many of the miles I have now). Cost would be $350-500 to transfer miles. We'd probably have to move hers to me as I'm the only one still racking up AA miles.

Delta charges 50,000 miles one way (ouch). So I'm very short there.

Any strategy on the best way to approach this puzzle and fill in the missing miles either with credit cards or buying points?

So far best I can come up with is I sign up for the City AAdvantage card with the 50k AA mile bonus. That would put me at 123k AA miles (after paying the $$ to merge my wife's miles with mine). Then I'm short 7k AA miles which I will certainly rack up this year.

Anybody see a better solution?