Sounds like a great philosophy of Vader; I really do look forward to what you end up producing along these lines.
Since you asked, my idea with LOE for Anakin was that he becomes involved in growing tensions between his loyalties to the Jedi Order, Palpatine, and Padme. He’s tossed around for a while, then Palpatine springs this nightmare on him as a manipulation. From that point on, he leans toward Palpatine and has to make the final decision when pressed during the ‘assassination attempt.’ All along, he never appears paranoid (a byproduct of changing his storyline in reshoots IMHO) until we see him talk with Padme on Mustafar, after he has steeped himself in the darkness. It’s really not that different from what ROTS was going for with Anakin, just restructured to have it make more sense, arguably reaching closer to what the pre-reshoot version might have been. In my version, as in the original, Anakin still carries that ‘slave’ mindset, seeming to crave someone being a master over him. Your version will be quite different, in subtle ways.