Originally Posted by Bloodthorne
does it really matter?
Ofcourse it does, its the maths behind which mage can hit the hardest. But I'm guessing he meant Abilities AP Ratio's. Same thing I guess.
I know of afew very high scaling abilities,
Janna oddly enough has some high ones (0.75-0.9 AP Ratio), Kassadin famously has some very good AP values (0.7-0.8), Ezreal is another (0.7-0.75), then Malzahar with very impressive ratio's (0.8 on most and a huge 1.5 on his Ulti).
Your best bet is to check the Wiki, has all the abilities and their scaling/ratio's on there. Along with the AD abilities too.
Hope it helps.