I don't really play PvE much, and tank when I do, so assuredly I do not have the best advice, but if you are looking at a PvE build and the only Bow skill it recommends is Endless Hail, you could simply use a 2h instead on that bar, and replace Endless Hail with Stampede for a very similar result. Use an Infused 2h with the Weapon Damage enchantment. Since Bow has Crit-boosting passives that 2h doesn't, you'll lose some damage overall by doing this with no other adjustments, so there's probably a better way to run dw/2h DD, but that's a start at least.