This can't be done
Each suppression takes about 1-2 mins of game time. Before I finished the game my XP count was only 4k less than calinda's, BUT... I needed like 1850 suppressions. Even if I lose 1 min per suppression, that's 1850 minutes or 30 hours. That's over a day.
So Calinda's score is safe and sound, and I still think it's the best possible. I think I have like 700 suppressions left... And the way this is going, I'm going to lose at least 2 days in doing that, so I'll end up at day 13 I think. We'll see... I'll post the score and the stats after I'm done. With a bit of effort, I should be ready tomorrow... but we'll see.