I've been sorc now for a little time and I looked at the spells I did not study.
Dampen magic 588
Amplify magic 197
As far as I've been able to tell the reductions/increases share the same ratio.
Anyone done some testing on these spells? I can imagine for example Mirror Image could have some usage if you use dampen magic but with the decrease in healing efficiancy I'm not sure.
I believe its sad that the Sorc guild only have 1-2 spells people at all use and even then they are not used alot.(Prismatic spray & Store spell)