How Attack and Defense work?

[Ryastar]

For every 1 point difference in att and def, damage is changed by 3.33% to a max of 300% and a min of 33.3%. So if att>def, then damage is increased by 3.3% per point, and if att<def, damage is decreased by the same amount per point.

You know, a lot of your questions have been answered elsewhere, you really should try searching for your answers instead of starting 6 new threads.