I was afraid that wasn't worded very well
That replacement only refers to damage modifiers on gloves and gaunlets. It means that the base Cunning damage modifier (40%) is switched to Willpower, and that the base Strength modifier (40%) is removed and split between Willpower and Dexterity (also base 40%), resulting in 60% Dex and 60% Wil damage modifiers.
Guided Hand does not affect your own stats in any way. I'll try to work out an explanation that is more clear. In all cases, aside from Harkor Zun's gauntlets, you'll have 60/60 Dex/Wil dam mods. Harkor's has different base modifiers, so the it ends up slightly different, but undergoes the same method of substitution.
Sorry for any confusion.