+6 rage or +1 attack?

[Vilk]

I don't see at all why the +1 attack is always better. You don't have much chance to increase your rage level than by the skill that only adds +30 and by the hero level up. Many items increase your attack very few your rage.

I suppose the +6 rage if for the Paladin level up, the fighter gets a +7 rage. It's very cool to chain fights and always have a high level of rage at the beginning of the fight and to achieve that a higher rage helps a lot.