Okay, so I have a character that is going to be switching primarily as a god-like archer to serious demon killing mage for the SI and mage guild quests. I'm wondering what kind of crazy devastation people have been able to create through spell alters. Either compounding level boosting spell techniques, or unique touch or AOE hellfire. Please be as specific as you can so that many of us can use and see your creations at work. Thanks.

Weakness to fire and fire damage at 50. It's a target spell.

Or you can use a touch spell and make the area 10 and do fire, cold, or lightning as high as you want.

UESPWiki has a bunch of stuff listed that you may want to check. My stuff (below) isn't on there because I can't seem to get them to confirm my email and thus cannot contribute.

I have too many to list. Favorites are Succubi (anything near me dies from absorbing its health, fatigue and magicka while being calmed unless it has reflect spell), Pyroclastic Cloud (combination of fire and electrical damage plus drain fatigure plus weaknesses), Miasma (absorbs health, fatigue and magicka plus paralyze for anything near me), and Singularity (drain health, magicka, and fatigue plus weakness).

Of course, there's also stuff like Riot where you frenzy crowds. Illusion is way overpowered, so be forewarned!