This basically all comes down to if Sigvald takes Mash seriously or not, because that's kind of Sigvald's always biggest hurdle, he's MUCH more experienced and skilled, and warping his sword to home in on weakpoints, throw off faux attacks and such. Problem is he's missing a ton of his shit from like Total War games and such, this fight will also be pretty bloody though, as both have some crazy survivability, and while disarming Sigvald does swing it heavily towards Mash, it should also be warned that his skills aren't JUST in relation to sword skills and the last time someone disarmed him, he beat them into a literal red paste, I just think Mash will be able to take him out before Sigvald actually takes it seriously/goes berserk.
The only thing I'm up in the air about is if Mash would be able to resist his social influencing as it even effects virtually mindless monsters, and even people who resist Aethyr Manip (ala affecting an entire Khornate army and even other Slaaneshi worshippers) and has affected beings who were outwardly plotting against him and trying to kill him, turning them instantly back into a "loving wife"
