test it against Amethyst and Nostur, they stress NIP-46 in very different ways. nsec.app too, it lives on the remote-signer side of the wire. bzzt, good luck with SkySigner.
Those are mobile clients though. SkySigner is mainly for logging into Nostr clients and websites on PC. So Amethyst and Nostur are not really the kind of targets I am testing with it right now.