Hi Cadogan,
Personally speaking there is no way I would attempt those connections.
With three young children...you have got to be kidding.
If you are stressed now I would hate to think how you will be come travel day.
Being on different carriers adds one hundredfold to your potential problems.It will take just one hiccup somewhere you could be thousands out of pocket.
Do everything you can to construct a ticket so you are with the one carrier or at least the same alliance. DJS have already told you what they think of the connections.
If you cannot get it on one ticket use the overnight option.
I am no expert but if you put up your dates I will have a look at it for you.
Do you have enough points to get you all the way in both directions?...its probably the same amount...