As it is, the most magic armor you can shred in a single turn, without Source skills or hail strike, is like 400 with savage sortilege crits and 6 AP (magical poison dart, fireball, fossil strike), so I don't really see people chewing through magic armor in one turn later on.
Don't state your guesses as if they were facts. Going into the final fight dual wielding earth/fire wands it was quite easy to do over 600 damage with 6AP of attacks. No skills, just plain old wand attacks where the earth hits first followed by the fire.
