Hi Oliver-
Would it be possible for you to add
f: \footcite${1:[$2]}{$3}$0
to the possible options of citing methods? Footcite is used quite often in the humanities in europe (at least germany, austria and switzerland).
I was just about to take care of this -- and I see from the feed that Haris did it already. So you should be all set to use footcite.
-Alan