Dual wielding or 2-H W + Shield?

Hi all

I'm completely new to this game and never played POE before

I’ve been following a youtuber’s guide and playing duel-wielding giant blood warrior.

But I'm wondering if I should switch to a 2-H weapon + shield build to increase my survivability for the endgame?

I’m not sure if I’ve done my math right For example, if the sunder’s damage is 397%, while duel wielding, so my damage will be decreased by 60%?

One thing I'm sure is the mace strike’s DPS is much higher while dual wielding

Tks all 🙏🙂