Watch them get the death slot #2.
I've never understood why people think: starting early = death slots. It's maybe a minor issue in the semis but in the final it absolutely doesn't matter when you start but rather NEXT TO WHICH country you start.
In earlier years you would win from every starting position because the slots were drawn randomly. These days of course (!) the winning song is mostly from the last positions of the second half because all favourites get the "best" slots (given they were drawn to the 2nd half).
I already explained it - to me starting very early isn't that bad because all people I know are getting tired after 15 songs and don't pay attention much then... maybe they look up when a favourite (or the own country) is announced and that's where the importance of performing before or after a favourite comes in. A weak song surely profits by this because people are still or already paying attention when a favourite or the own country is performing.
Just my opinion. Nothing to do with the sisters. Their "luck" depends on the countries before or after them.
But if you're good you will win from every slot!