A couple people have mentioned distributing their stat points fairly evenly, but didn't give any details of their builds, that I recall (presumably they were using mixed 'class' characters).
I used a DW pure warrior on my last playthrough on nightmare with balanced stats in str/dex/int. I began with putting pts in just str and vit until lvl 4, with a pnt or two in spirit until it reached 5 and that was it. I stopped investing in vit when it reached 15 and used charms and enchants for the rest of DKS to boost it and my HPs.
From lvl 10 to the end of DKS ( before FoV ) my str and int stayed pretty even, within a few pts, and dex fell in there around 20% less. The balanced stats fluctuated as I advanced lvls. I would keep some pts in reserve when I knew I was within a lvl or two from wearing a set of armor. I would wait until I wore the armor and then, (in this order) enchant/charm/add stat pts. The stats went where they were best suited to even out the three resistances. My goal was to try to maximize my weapon dmg output (norm and magic) without the sacrifice of resistances. For instance, the Black Ring loves to use Curse and with an elevated int that helped me from falling under it as often.(it lowers your dmg output)
I selected weapons that when used together had an ending balanced dmg output. If I found a weapon that was high in norm dmg I would pair it with a weapon of high mag dmg, or wield two balanced weapons. Although I only invested in the warrior tree, and only used a bow on three enemies, having a raised dex I could use an enchanted balanced bow with fairly effective results. If I chose to do so.
All in all, I was very pleased with my character. He was able to stand in the middle of a group or start at edge and draw them out 1 or 2 at a time. I used Rush Attack for the most part and followed up with a 1 point invested Whirl Wind or two. At higher lvls I found Bat Rage to be very useful before going up against tuff baddies. Once I reached lvl 20 or so I was dealing out 600+ dmg w/ a single blow ( 1 of 2 ) and with high dex that would deal 2200-3500+ (with a crit hit) by the time I got into the 30s.
It all comes down to playstyle and preference. I found this path to be fun and effective with a strong and hardy character that could 1 to 2 shot most anything in the way.
EDIT: Here are my ending stats, with full equipment, before FoV. (scroll to 3rd from top)
DW WARRIOR 
