I know how you are feeling :sad:. We had some issues with Riley a few months ago and have been working very hard to fix them. It is frustrating when we seem to do everything we are supposed to and then still end up with a problem dog. The good news is that Riley is very improved and I am sure you can make progress with Autumn.
Check out this
http://www.amrottclub.org/rrrr.htm. It is called Radical Regime for Recalcitrant Rovers and is basically a stepped up version of NILF.
I would recommend keeping a leash on Autumn at all times so she can easily be corrected. I would also move to feeding her only in her crate. Everytime she is successful in bullying Blaze (or the cat) gives her more likelihood to continue with the behaviour. Eliminate the opportunity for the behaviour to happen for now and as she improves you can go back to supervised eating etc. I personally always feed my dogs in seperate rooms and have since day one
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I would also recommend you try a prong collar. I know tons of people are very opposed to them and think they are a torture device. I have a big dog with attitude and basically he can run right over top of me so we needed the prong and it has been great. It is actually much more humane then a basic choke (yes, I tried both on my leg and the prong/pinch was much better). Use the prong in your basic obedience sessions and to enforce that you mean business when around the door etc. Here is a great article on the use on them
http://www.flyingdogpress.com/prong.html.
Good luck
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