Careful with whatever you do. I had 75 FR/CR, 59 LR, and only 21 PR, but I just RIP't in A3 Hell. Undead Soul Chucky Doll fuckers are a royal cunt. Tore through my decoy and Valkyrie and smashed my shit in. Couldn't even alt+F4.
But, the build above for Bow does work. I've used it before, just recently started again. I think my freezing arrows were hitting for around 1600. Maybe a bit less. I don't think you can ever solo Hell CS with the cold immune oblivions, but the build itself is still workable. Albeit highly squishy.
You don't get Natural like a Barb, no Bone Armor or minion army, no Energy Shield and teleport, no Holy shield or innate tank ability. You get passives and a Valkyrie. Arguably the squishiest of all the HC toons. My stats were 70 STR, 240+ DEX, 125+ VIT. STILL ate shit.
But it's HC. Time for another spoonful.