I am very happy to help you
please excuse my english, it isn't t.hat good lol.
Now here is a very fun advice, if your going pure Mage where your conjuring animals, undead ect,, to fight with you while your casting,your destruction spells, aye that can be ok fun, or you going spell sword, weapon in one ha d destruction spell in another hand and your going toe toe with the mobs, npc'c, that can be ok fun or you going full battle age, where. Conjugation, alterations and destruction is what makes you stand out but if you don't have a follower to help you fight, it Can be very nasty at times when doing High level mobs.
BUT here is something to think about. Take up Sneaking Skill to 100,. Then you can be one nasty sneaky Mage,. Here is an example, say ou need to enter a tomb full of vampires and necromancers, your sneaking thru the place. Very slow taking your time checking or surroundings,you check next room and see about 6 vampires and necromancers,. OH CRAP this can be bad, BUT wait your in sneak mode, your at the doorway of the room and being I sneak mode they have no clue that you are there, so you power up one badass fireball and unleash it on one of the mobs that is farthest from you, BAMM he is toasted dead, your laughing your ass off cause the rest of the mobs in the ,room has NO idea what just happen or where it Came from and for some odd reason or HUGE IF saw it come from the doorway or dark coner your in then you make a fast run away and go back in sneak mode then come back rinse and repeat till all is dead.
Tell me that doesn't give you a total rushi, rofl