No formatting because I’m half-passing out at the time of writing.
1:1 on STR and DEX is not the greatest of ideas, unless you decide to dump CON and leave it as low as you can. If you’re looking for a crit build, then I’d say focusing more on DEX and getting Critical Attack enhancements would be the way to go. Highlander 1 is a must for crit builds, too, because of the 2H Sword Mastery attribute which gives up to 50% additional damage on criticals.
I’d also get at least one point in Pain Barrier and cut Thrust off since it’s practically useless by the time you reach Highlander.
My biggest piece of advice would be this: either don’t spend more than 10 skill points at Barbarian 1 (to save them for the next rank), or use a skill reset scroll once you reach Circle 2. Warcry’s great for mobbing using autoattacks, so get that if your build is going to be more STR than DEX oriented, and since you’re getting Frenzy anyway you might as well make the most out of your autoattack damage. Up to you on what to max, between Cleave and Helm Chopper, but you should max Seism first. +Critical Attack gems are your friend, don’t neglect those or gear that boosts Critical Attack.