"I'm a DW fan and deeply hurt, if someone thinks it's not the best possible combination ever, and I disregard any valid arguments against it, even moreso, I try to make it appear that the argument is invalid"
Do you even know what are the chances of getting a perfectly rolled weapon? Do you know what are the chances of getting two of it?
Yes a perfect quiver is hard to find aswell, but if that's not perfect it's not nearly as much of a DPS loss, as having a worse second weapon. Also as I understand you talk about late endgame, yet you still plan on playing a full glass cannon not valuing defensive stats at all?
Weapon needs +elemetal dmg, +%dmg, +attack speed to be onpar with a high end 1h (you started talking about high end stuff so here we go). so it can have 3 extra stats out of: critdmg, socket, dex, dexvita, +10 discipline, hatred regen. Skipping +10 disc would be outright foolish (especially if you're a glass cannon..), so 1H is left with 2 dps stats (high dex is achieved by rolling both dex AND dexvita or dexstr or dexint on an item)
Quiver has 6 stats (AS is baseline, not one of the 6 affixes) let's assume you still don't care much for defensive stats. it gets the same +10 disc, it has 5 slots left for dex, dexvita, crit, socket, Demon hunter skill damage, hatred regen. so youre basically saying that 2 affixes on 1h > 5 of these affixes on quiver.
Oh and if we assume really high end gear, why not have a Dead Man's Legacy: 5% more AS, 149 dex, DH skill damage, hatred regen, 83 vita, we take 10 disc here aswell so we got 1 quiver affix of our choice here and that's worse for you than 2 affixes alone from the second 1h? ok.