I just got my sorc to V12 and i've made most of my gear including 5pc seducer, 4pc magnus sets, added weapon damage & spell damage to my rings both having over 700 magicka, neck spell damage with over 700 magicka, fire,ice,lighting staves with 5% crit and 400-490 glyphs for each staff and being breton on top of this with seducer 5pc thats 11% magicka reduced and in long fights i still run empty on magicka also using power surge my spell damage ranges from 1500-1600+
60%+ crit with gear and inner light, so my damage has greatly improved with some better set gear and enchants. i'm not sure if the real problem is my magicka regen or magicka cost.