Game Mechanics: AC may not be working correctly

[Fysts]

On live there was a softcap to ac, i believe it was around 289 worn ac,after the softcap returns dimiahed but did not go away. The advantage to plate wearers was the 289ac from softcap yielded more ac return. There was also believed to be a hardcap around 1300ac calculated, and this is why monks were able to tank so well in velious, because they could hit the hardcap by wearing the high ac itemz even though they didnt get the ac return of plate.