This is my apparel:
Robes : 25% Destruction + 25% Conjuration spell reduction cost
Ring: 25% Destruction + 25% Conjuration spell reduction cost
Also, I've got the perk for "Cast Adept spells for Half Magicka" perk in the destruction tree. But Ice Storm spell, which is Adept level, still costs me magicka and I'm out in about 9 dual casts with 600 magicka (nothing like the vids on youtube where it costs nothing to cast them).
I've used Grand Soul gems for enchanting my stuff. Is this the reason they don't work? I've also added/removed my apparel, but though the reduction shows up in 'active effects', it doesn't do anything.
EDIT: I've just been reading up, and sorry, I did not notice that you need to enchant 4 pieces of apparel with 25%. This works, true, but then the perks of cost reduction are completely pointless right? What is the reason for those perks, can someone please clarify?