@Jai C. I don’t think there’s any hack to this except making sacrifices and being disciplined, as mentioned above.
I treated my applications like a full time job. I would be at my desk at 10am and leave at 6pm Saturdays and sundays. As you can imagine, I managed to complete all first drafts within 3weeks.
I would then get the apps (I worked on 5 apps max) reviewed if possible before completing draft 2/final drafts.
Long story short, I sacrificed 2/3weeks focusing solely on apps, investing 16hours a week or more. Once they were out the way and submitted, I focused on my uni work.
I like to plan everything out visually, so creating a table with all your commitments also helps. Tick them off as you go!
Good luck!