Impossible, friend. Mods dont do anything. What is causing stagnation is your own mind. If you think of mods as something thats supposed to boost your performance (they may, a tiny bit), then it means you are focused on your performacne, not on learning. Those two are opposites.
To improve, you need to completely forget what numbers you are pulling in any way (even how many shots you missed due to bad skill, not to mention totalitarian wn8 or winrate) and just delve into the gameplay you are doing itself. Observe what you do, how you do it and why you do it and try outvarious changes to th