Knowing where your spells are going to land while casting them is fine, mainly due to it being you casting the spell. So in turn you are visualizing the area of effect for your spells, it just always seems off when you see what the monsters AOE is. Some things like big long-cast spells sure it's fine to see a visual representation of where is going to get messed up but if it's everytime a arhiman uses air vacume or a crab uses bubble shower....bleh.