This one is a unique case for a tas.
You really are pressed on time if you don't get X item before someone else does. Like defensive abilities or ones that cause a lot of damage that you would want.
Speaking of weapon that does a lot of damage, its one that I ban in my current tas that you can find in my latest userfiles. I'm not sure what its called, but it fires out some projectile in the air and lands on some opponent by some luck. I hate it, and its not very entertaining to watch some lucky shots to end a match.
Also in the movie in my userfiles is that I make heavy use my the default machine gun you get to embarrass the opponents who have much bigger arsenal.
It goes through the first 3 stages, and I'm just taking a break for now.
Does anyone want to see more? There exist a 100% speedrun of this game on youtube with a time of like sub 2h50m. It completes all objectives, but doesn't get all kills.