My first on Nightmare, actually. Being a Barbarian certainly helps, since you can dish out enormous amounts of damage by dual-wielding two one-handed weapons.
Some examples:
Giant Leap ~ 4500
Rush (or Charge, as it's known for a Barbarian) ~ 2500
Meat Spin (radius 2) ~ 5000
Win(d)blade (radius 4) ~ 6000 (On the overpowered Wyrms in the Vor room of Death I saw 10596
with both Heroism and Mutant on. I just wiped out the center in one attack)
Any character that hits me gets a counter-attack @ 250% weapon damage (I've seen 7200 here)
Some other data:
96 accuracy, 304 damage, 115% weapon speed, 135% movement speed, 170% global speed with Eden's Guile, crit chance 140% with crit multiplier 356%, physical damage +46%, 2200 life, 29% all resistance etc etc
as I wrote before, Barbarians are a bit overpowered
http://te4.org/characters/34419/tome/55 ... 0eceb956cc
I did find some interesting items:
Heroism +36 / die at -1578 (@ 214 strength)
Movement 1154% / 9 turns (@ 147 dexterity)
a randart Drakeskin armour of Alacrity (+9 str/+8 dex/+8 wil/+8 cun and 15% combat speed)