The only change you need to make to Edge of Night

Shield duration: 10 seconds--->3 seconds. (maybe 4 or 5)

Maybe up the CD too, but honestly it does not need to last 10 seconds to be useful. It's mean to be an item that assassins take to deal with spells that hit them while they are trying to do their thing. It rewards players for preparing for a fight and getting the drop on people. It doesn't need to last 10 seconds in order to do that.

The reason its op right now is because ADCs like Jhin take it and are using it as an extra safety net even though they sit in the backline.