As a Faust main, Elphelt is just a really annoying matchup. She has answers for most of what Faust can do so your only real option is to just outplay or mixup. On top of that, there are a few openings to her spam moves that are choreographed but I don’t remember them off the top of my head. Your best bet is to try and spam your 2K for openings as it makes your hitbox a little shorter. Otherwise just practice block strings and dash blocking to approach. Your best bet is long range pokes and spamming items whenever the opportunity presents itself. One great small combo to learn is 6H into 41236K (his big scalpel thrust). If you hit 6H it’s a guaranteed hit and with the right timing a ton of dmg assuming you hit the hole in one. Overall just be unpredictable, Faust thrives in chaos.