MW Langes Messer stats in 2h mode: 37 swing, 27 thrust and 101 speed.
Its okay in 2h mode, but dont expect too much. You still underequiped when facing longswords. Personally id still go for the mace since it has blunt and knockdown or the fighting axe cause it bashes shields. But thats just me. Also the Messers 2h swings always kinda made me feel a bit uncomfortable, so im kinda clumsy with it, which is why I dont use it.