For those claw pieces, my favorite use for them is as feet, but inverted so that the tip is essentially a pointed jester-y toe, and having the triangular bit on the back of the claw as the 'pad' of the foot.
Unfortunately a limb piece with a ball on one end and a socket on the other simply does not fit into the Inika build paradigm where upper limbs are always double sockets. Ironically it works a lot better with CCBS where almost all limb pieces are ball/socket.
