Have 250 Dex at lvl 99 that gives you 75% block, in order to have 2-3k life, put about 235 into vit, as for str id say get about 185-195, keeping in mind that str adds to your damage.

As for your gear tals helm would prolly be best if you have a low budget, also venom grip arent good for a barb, use Imortal Kings gloves (if you have 10+% life leech) a good ring to use is a raven spiral/havoc spiral and get a good raven frost, or another spiral, which ever you prefer. As for the ammulet id suggest Shadow necklace (2 barb,4%LL,18str,18dex other mods) a maxed whirlwind isnt neccessary id say about 15 you only gain about 100 dmg at level 20 compared to lvl 15. Also if you wish to be good in pvp i would get your minimum 1 hand dmg to 1500+ and max to 3000+, which you probably wont be able to get with a Cruel Colo sword or blade. Also if you cant afford stormshield, go with either Tiamats rebuke dragon shield (adds about 400 elemental dmg) Or whistans guard (Orphens set shield) it offers good block with semi decent mods.