a str armor would be very helpful if ur planning to solo alot, tank barbs uses ee to take the dmg in the cata, yet the can also take dmg during welling/arena. the more str u have the more dmg u have, here's a basic guide for new slashers:
http://forums.d2jsp.org/index.php?showtopic=23010118&f=272,
try to stick with the chain/plate mail rather then a robe to reduce/tank the dmg, the charm= the more str the better to get the most dmg u can get
this is my build for a barb which includes dex, really recommended for users who have good gears (weapons)
initiative points (+10): 5vit/5dex
1-31: all str
32-55: all dex
55+: all str
gears: weapon the higher ee the better
armor: +str (30+ recmmended)
charm: +dex (30+ recommended)