I should qualify my statement: 10k damage was to lower level monsters with negligible magic resistance, and involved 2 spells (level 15 fireball followed by level 15 magic blast), with maxed-out destruction and maxed-out 'way of the battlemage' currently active. And all my equipment was chosen for +magic damage, as well as using a couple of gems for an extra +200 damage on my two weapons. And I only had 700 health (including the +400 health enchants across my 4 armour pieces)
I understand where you're comin' from. I've played around with that DW/Mag Mis thing. I'm not 100% convinced that that was intent and not an ovrsit. Any character, at any point after the tower, can respec and max out Mag Mis and deal massive dmg, even if you screwed up your stats, with the +200 from both weapons (100 ea). I have a very low intel, (in and out of the game) and will use that to fall back on if this character doesn't pan out.