I actually think I'm improving of my stiffness

On the first one, Nice punch!, taking off his arm and decapping him. however, you tried to take his remaining leg off twice, and unfortunately failed. you can use shift +P to go forward in frames, then press E and edit the replay where you think it goes wrong or fails slightly.
couldn't load the mods on the other ones. Said "error, unable to load mod"

Thanks for the comment about the punch! I've went back and tried so many time to get his leg off. I even edited again. and you need the latest version of toribash 3.72 for the other replays