I didn't have much time, so this is a quick effort with no secondary optimisation. I haven't fully satisfied myself that this is min, but I can't see a way to pass a single atom (either salt one way or vitae/mors the other way) to make a 2 arm layout possible with access to anime. Unless you have a bonder/debonder on both sides, or a piston, which costs the same as the extra arm. I feel there's something I've missed...