If your theory doesn't match how the matchup goes in practice, that just means you're not considering certain elements of the matchup. Saying that you could, in theory, run away and laser all game is dumb because the only way you can do that is if you play perfect. Too often people get caught up in playing perfect (myself included). It seems paradoxical, but trying to play perfect is suboptimal.
Have you considered going Puff on your cps? Idk how much experience/fun you have with Puff, but I certainly think any player that can cp with a solid Jiggs has a chance at taking games from Armada.
I think you should just stick with Fox for the most part though. Just throw out what you think you know, and try and get some new technology. The reason you feel like you can't catch up to Armada is because you're playing his game. If you flip the script and do stuff he hasn't seen before, even if it's not terribly effective, it can make openings in other aspects of the game. /imo
Your Fox is so sexy, SW. You obviously aren't afraid of FoD's low plats like 99% of players, and it shows.