1H sword + shield better than a 2H sword?

Thanks in advance to all of you that answer this thread.

So my question is, I know a 2H sword is strong but slower compared to a 1H one, and that a 1H sword while faster, would be weaker than a 2H even if both had the same attack, (unless I get a shield with attack). But does the shield really make that much of a difference? How high does an attack shield put a 1H sword compared to a 2H one. I know this related to DPS so lets say, which would be the difference in DPS between a 126 att Execuciones + a 7 str 14 att shield and a 130 Att Nibleheim?

I am asking all of this because soon I will be forging a Reverse sword for my Hero, but the thing is I can't decide wether making a Nibleheim or Execuciones.I would take the 1H one, but a good attack shield (7str / 14 att or so) is worth around 800 mill in scania, making the 1h + shield combo worth 3 times more than a 2h one. I don't wanna do this if the reward wont be that big.

Need to know how much off weapon attack and total strength you have to be exact However, a rough approximation, with an Apple, the Nibleheim would marginally win (1.002x or higher DPS). With more off-weapon/shield attack, the Nibleheim would just jump further ahead. Otherwise without the apple, the Executioners is slightly better. (about 1.02x or less DPS) You require roughly 1.05x more weapon attack to match DPS on the twohander with a onehander.