It depends on your difficulty setting and your combat tactics. I'm sure it's technically possible, just be aware that even mid level archers on Adept and Master will one-shot you if your Ward isn't ready (or if you're OOM).
That's actually a great idea for an interesting self-imposed challenge; pure mage on Master, no armor/ alteration spells, ward as only defense.
I made this build yesterday , played a lot (need some sleep now, reached lvl 25 in expert ) , for the moment it works fine , i get one shotted from time to time , but only when i'm not careful/concentrated
I think it's a good challenge , ignoring alteration allows me to reach my "build objectives" before lvl 50 :
I wanted to stack conjuration( i want 11 perks )+destruction (i want at least 11 perks ) +restoration ( 8 perks )+alchemy(i want 7 perks ) +enchanting (8 perks needed ) and still have room for a bit of illusion
I found combining summons + frost & fire gives me great offensive potential (coupled with alchemy and decent enchanted gear) , i also use illusion as defence (invisibility , calm ) when things go suddenly wild (surprised by many enemies ) or against archers (priority targets with enemy mages ) , i use wards against magic (although to be honest , most of the time dual casting destruction is more efficient , but i don't have ward absorb perk yet nor high level wards ) but i hope they'll get better (i think need to wear a restoration reduction cost cause in noticed the lesser and apprentice wards cost a lot of mana compared to what they bring in defence ) .
Anyway it's fun so far , a pure glass canon , but still nice to RP , my 2 previous characters were totally OP and this time i wanted an uncompromising Necromage build with an achille's heel
