Actually Mandilorian steel is resilient to Lightsabers so if the "Non-Saber" bits of the Cross guard are made of Mandilorian Steel then it would be a very smart move on the Lightsaber Zweihander, since that would be expensive yo
I thought alloys of that nature were exhausted and the weapons made from them destroyed (the handy excuse as to why every imperial officer was not handed a vibro sword for jedi hunting)
That being said
I was thinking in part of
and if this was true I've noticed some zewihanders have curved quillons that cut off the wrist of the wielder if they were to fit like that.
Also it'd require a feat of Cinematography to make a fight like that look epic.
Even then I'd be a riot if it turned out horribly.