dwarf with eng gun due to + gun racial, eng made ammo is seriously good. if blizz follows classic dodge rules, shots can be dodged which also makes NE good since they have highest dodge in game
SM back then was rank 1 stealth, meaning you can see a NE in SM 10-15 yards, same as a combat rogue. a rogue with 3 points in improved stealth (sub tree) will be able to see a NE in SM and get openers with ease