Okay, so my cousin in Sydney needs to go to NYC and TLV with her hubby, 4 yo, and 4 mo. Has lots and lots of SQ points (say 250k for the purposes of this thread), and a reasonable number of UA points. Needs to go to TLV first week of September for 10 days, then to NYC for 10 days. Wants to minimize cost (including getting as many award tickets as possible), wants to be in biz as much as possible (including using miles to upgrade), and wants as few flights/as little time in planes as possible.

So, keeping this in mind, remembering the lap child (10% of full fare when upgrading), the child (75% of a normal fare, but 100% of the miles for an award ticket) and the other parameters, how would you do this?

I'm thinking one SQ RTW C award, and 2x RTW Y revenue. Deal with Y from SYD-TLV and then use UA miles to UG TLV-NYC and NYC-SYD. Any better ideas?