Just for fun, I wanted to see what the highest possible damage I could get was, after a few runs of Havendale Bridge I ended up with a 335 damage Orc Berserker.
Preperations I took in was Whurrgarbl sword, +2 sword (which I later converted), Swap: HP for ATK, Black market, Adventurer's allowance, shop scroll and scout Altar.
For the strategy I took Taurog and grabbed the Blade and boots then switched to GG and grabbed humility and finally enlightenment, which gives you +5 attack, 100 conversion points and 15% resists.
I chose Havendale Bridge because the troll drops a conversion stone (300 conversion points) and also enemies drop those magic resist pendants which can also be converted, there's also magic damage enemies which are very easy to level up with as Berserker. Also most of the level 1-2 enemies are clustered together at the start so you can kill them all before switching to GG and avoid losing piety.
I was pretty lucky with shops because one had a Fine Sword, although if I could have nabbed a trisword this would have been even better.
Before killing the boss my damage was 322, killing the boss gave me a level up to finish with 335 damage at level 9 (aka level 10 without humility)