You haven't played a two-handed DD have you.

a
Poor Apoc won't stand a chance when Liberators start showing up, trust me. I think you're greatly underestimating the doubt attack bit. This weapon will allow you to use a stronger weaponskill than Catastrophe at at least 1.5x the frequency. Our beloved 6-hit build just became a 4-hit build (over time). That's the amount of difference it makes.
Also, I'd be happy with Conqueror removing the defense down effect. x_x Tired of getting hit with Eagle Eye Shot for 1500 and double attack crit on Salvage Chariots for 500+ each time. Not that I'll ever get a Conqueror - if I ever get a mythic weapon at all, I'll be stuck with Burtgang, because SE made the damn thing so fucking amazing that I'd be stupid to get anything else.