How well have all these specialized Armory manipulations be audited? I assume they haven't been audited and scrutinized as well as Bitcoin Core has. Forgive me, but I'm a bit paranoid. Not sure if I can fully trust Armory :S
Don't know. Unaware of any code review external to Armory Technologies Inc., all I can tell you is that address determinism has likely been well used, and this is since 2011 I believe. They've used the same wallet spec since very close to the beginning, so it's at least mature, if not professionally & independently reviewed. I can attest that it's never been a problem for me, and I've used several hundred addresses from a single wallet without problems.
