Damn I was working for like 3 hours
But now i don't know what else to improve it because my arm hurts now
I've got a vid uploading showing my strat, basically I'm shooting at the ground while crouched so my momentum is less upwards and more sideways, then jumping and firing a second shot. It's not easy because you have no idea where you are actually going to start with. It's beatable still for sure but I don't think it's gonna get under 4 secs
Edit: Here's the video: