Alright. I think it MAY be possible to develop a hack or exploit to allow you to cast any spell at any distance from the target.
Some of you might say "BUT THAT IS HANDLED BY THE SERVER!!!". Guess what.. No its not! I've got a bug a few times while dual clienting..
Where my other character was WAY far away, when he was in fact right next to me.
I couldn't cast any spells on him, it said "Too far away". But he was RIGHT next to me.
So this PROVES that the client handles range!
My other character could cast spell on him, but I couldn't cast them on my other character. The map showed him to be far away.
So this PROVES that you can edit range.
I am currently working with Cheat Engine and a test account to find the range address. Ill let you guys know how it goes!