Which armor do you use, heavy, light do you use robes? Which weapons, if any? Staffs, 1h dual-magic Which ''specialization'' destruction, conjuration etc. Which professions have you worked on?
I always keep a set of good robes and a good hood, but also a set of light armor.
Have a good sword and a good shield nevertheless.
Pretty much everything. Conjuration (beginning of battle), destruction (during battle), alchemy (buffing), illusion (helps a lot, especially because I get annoyed when my screen goes dark).
All Robes except I have a light armor face mask that gives me 100% magicka regen. I do not invest in Light Armor perks, though.
Staffs can be useful. If I find any with anything higher than flames/frostbite/sparks, I will use it until I exhaust it. If I really liked it, I'll recharge it with Petty Soul gems. I also use my bound sword and bound bow if I need to.
Conjuration all the way, followed by Illusion. Illusion is very reliant on its perks as you level them, so if you want to use it start earlier than I did. Then I have an equal investment in Destruction, Restoration, and Alteration.
My enchanting is pretty high. I plan to play with it a bit more when I have the perks to spare, but right now I just enchant extra pieces of junk I have for extra $$$. I have too many soul gems and quite a soul trapping habit.
Conjuration starts weak, but near the end it becomes insane.
Being able to summon 2 Dremora Lords (yes, the talent affects it) is crazy. I can't stress how strong one of these mobs are, let alone 2.
Destruction starts strong and ends very weak. I find myself relying more and more on minions as I level higher.
Armour just isn't really needed. You should never get hit between minions and Impact stun. I tend to just wear whatever armour I think looks good, then enchant it with regen.
if i need tons of magicka, i use archmage robes. otherwise i use clothes i think look cool, or just full daedric, with the amulet of savos aren weapons i use dadric sword(enchanted heavily with 100 enchanting) and i use the master destruction spells/shouts. for the helmet i a mask i got it's a dragon mask with same armor rating as daedric helm, except it has +50 magicka, and -20% magicka use for destruction and restoration spells.