I just played this game again, starting from nothing, and beat it in four hours. Transmute + mp regen + heal. Save up gold, get that eagle talon, get to floor 70, buy potions, transmute them, escape, repeat. Get enough(+ultimate hp potion), head to sorceror and kill him. Too easy.
I vote make an "impossible" badge for completing Story Mode 200k in 3 days (without black market boosts). Or 4m is 6 days. I can do both, but it really is insane.