In addition to medical insurance I would also look at the cancellation/interruption insurance quite carefully.
If you miss one of your connections you might be looking at a few thousand dollars for a replacement ticket (depending on what connection you missed). I would say it's worth getting insurance to keep you on your chosen itinerary.
I agree with others that baggage insurance is third on the list. Just don't pack anything too valuable and I'm guessing from your travel plans that you might be able to absorb the replacement costs of a couple of cases and some clothes if the baggage does get waylaid.