Side bosses? The 3 to get the golden key? You do know that the buff recipes were insanely good until this patch.
From the shadow of the warmaker Balias, Ranissan and Mordlin are good weapons and from shadow of the priest king, Derketos voice (bow), Yogs touch (axe with high AP) and Ymirs targe for cold protection (if you dont have that other shield).
Here is a list: