Are you planning to solo or play a full party? A high Int barbarian I think is generally advised in the context hof spreading debuffs (like stun or prone on crit) from his weapons through carnage in a party.
The fighter build you're referring to is a pure tank build, which is ironic seeing the dumped Con, but a pure tank can become almost invincible (after, say, level 6, vs most level-appropriate fights) by focusing on passive defenses. If enemies hardly ever land a hit (let alone a crit) against him, his health simply won't drop enough for Con to matter.
Note that this all applies to 1.0.6. The system has changed significantly in 2.0, which is still in beta and only available on Steam, but it will go live in about a week. Are you planning to play in 1.0.6 or 2.0?
Hi.
I want to make a full party... I thought I would try out having a barbarian and a fighter. If I don't have a high int is my barbarian useless? I really don't see this character having lots just for game mechanics, I don't won't him to be a smart as a wizard just to get carnage to be useable... could I just leave it at 10? Are the effects of lowering it very bad?