If you level your Two-Handed and Dual Wield skills to level 100 you will be able to dual wield two handed weapons but only if your Slashing, crushing or pierceing skill is also at level 100 depending on the two-handed weapon you want to dual wield
But while dual wielding two handed weapons your parry chance will reduced by 50% and Dual Parry skill won't add bonus to parry, just the parry skill
Also Striketrough and mirrored blade bonus should be reduced by 50% or completely removed
Just think about dual wielding 85 slashers
