Sort and simple answer is yes! My second character is based around this build. I am currently level 32 and I am quite enjoying it. I rarely use equilibrium as I rarely run out of magicka and when I do I have a loooot of potions from hoarding them around.
At the moment I am dual casting apprentice level destruction - and yes this more than enough to kill frost dragons. maybe it takes a few more hits but it staggers dragons (not Alduin) and I am waiting till my enchanting is 100 so I can make my destruction free and not waste anymore perks. I use rune spells and conjuration (fire, storm and dremora lord) regularly to give me a tactical advantage.
Early game I'd suggest having a follower but not really that necessary later on.
I used restoration perks to increase my magicka regen by 50% so I can use atronach stone.
i use arch mage's robe, morokai's mask and self enchanted amulet and ring for giving more magicka+magicka regen. So I suggest doing college of winterhold quests asap. Right now I have around 430 magicka and 410 health.
Hope this answers your question though I am a month late :p
Edit:
I will put up my character build here and edit it every so often if it helps:
- level: 35 (atronach stone)
- Enchanting - lvl 100 (and I always use grand souls for enchanting my
gear)
- Destruction - lvl 90
- conjuration ~ lvl 86
- alteration - lvl 33 (I am including this as this is the next skill I
will try to develop)
- gear: orcish armor (destruction+alteration), ebony helmet
(destruction+alteration), ring (destruction+conjuration), amulet
(destruction+conjuration), ebony gauntlets (magicka+something nice). So
this makes all my destruction cost 0 magicka.
I tested this at the last part of the main quest-line
from the point where you enter Skuldafn.
It works rather well, would work better with some (crowd) control spells eg. paralysis from alteration, or some illusion spells etc.
If you are dual-wielding (in the sense that you "charge" one of your hands, then "charge" the other hand, then deploy them both) then what's happening is: Your first spell is striking the corpse and begins to re-animate it while your second spell hits the zombie. Since you can only re-animate a corpse once, when the second spell hits the zombie it causes it to disintegrate (like it does when the time expires or the zombie is killed). If that is what is wrong, then you must "charge" both of your hands at the same time so that a single energy ball is created.
Best Answer
You can learn as many spells as you can read spell books. The spells you have already learned will remain in your spell list. The only disadvantage of having too many spells is scrolling through them.