Hi all! New runner here during these last few months. I wanted to let you know something I just found out from a secrets video and ended up using the strategy in the battle game for Claire B. It turns out that if you tap the shoot button instead of hold it with the assault rifle, it fires much faster. This makes killing the tyrant not only much easier, but also faster to the point that I shaved off around 8 seconds from my best time. Hope this helps!