Don't shoot golems with arrows, they don't care. For mountains you want an iron mace or Frostner if you've found the merchant.

Running out of durability on bow on Moder = you are using poor arrows. You should be rotating poison / fire / obsidian on her to keep your DoTs going while doing good damage. She's pretty wimpy if you have maxed wolf armor and a reasonable weapon for when she's not in ranged mode.