I started replicating Freud's wall strat where he Dash Jumps out of the wall and then Dash Jumps back into it again for massive speed. Now I still just couldn't get his ending strat, so once more I stuck to my old ways. Well I got a big surprise, because it turns out my route actually was capable of getting the world record all this time! I don't know whether it's optimal or not, but only time will tell.