Hello to all...
i'm trying to make the best light armor (cause i want to level up the stats of light armor)
so that i can fight fire mages pyromacer's etc.
The material in your armor has no effect on elemental resistance , only the level/number of the Resistance enchantment that you add or find will help against magic attacks.
Best light armors are Dragonscale , Glass , and Elven in descending order.
Resist Magic is a better enchant than Resist Fire/Frost/Shock because it applies to all 3 elements.
You can add Resist Magic to your shield , necklace , or ring.
There is a "normal" Resist Magic enchant available with a base 20% max resist , but there is also an additional seperate enchantment on the Shield of Solitude(25%) which is a Thane`s reward in that Hold. If you have both , with high Enchanting skill and Fortify enchanting potion you can get 50+% resistance on one item with dual enchantment perk.
Magic Resistance caps at 85% so you don`t need more than that on your armor or in perks, etc
You can also become an Agent of Mara for a permanent 15% magic resist without using an enchant slot on your apparel. There are some perks that can help as well in Blocking and Alteration trees.
The Lord Stone gives you 25% resist.
A certain Daedric Artifact quest will reward you with the Spellbreaker Shield which stops 50 points of all Magic attacks when blocking.
Hoping this helps