SCORE: 1727
Paladin on impossible, 7 days, 103 quests, and no casualties.
Killed everything (except for 1 enemy at Islands of Freedom that was used twice for the no-army-suicide-travel trick), grabbed a Tactics Treatise very early at level 4 (and kept on using it except for the last two fights), prioritized getting Learning 3 and Keeper of Light 3, but still nowhere near reaching level 31. So it's safe to say level 31 is unreachable except via mods/cheating.
Of note is that I used Phantom A LOT, and used it primarily for the "free" Emerald Green Dragons. Looking at the combat statistics, it seems that the phantom EGDs where not counted as spells, but as EGD damage.
It's also funny that the Thorn Warriors that my Dryads summoned actually surpassed the Dryads in damage.
It has been a blast playing this game.