If you can cast a spell 100 or 1000 or 5000 times and still not be good enough at using it to "eyeball" it then I feel bad. Adding an indicator would make an already simplistic game even simpler.... This is why I feel it is sooooo the wrong direction to go. You wouldn't even need to learn your spells effective area, it would just show it to you. Someone who just got firaga is going to be just as good at using it as someone who has cast it so many times. That is what is wrong with an indicator.