It's hard to say, but I always struggle to bet for France in the relays, because someone usually has a meltdown. Simon and Braisaz are also pretty unpredictable shooters, even if fast, they can have good days, but they also have really really bad days.
Since Hettich and Hammerschmidt are shooting very well, Preuss is pretty good and Herrmann is regaining some of her form, perhaps I'd lean towards them? Sweden is not having too good of a time in Oberhof, so it's tough to say if they can challenge for the 1st spot. Belarus and Austria could do something on a good day.