Personally, I’d build the Dakra Prime for straight Damage, as the Critical Chance is not high enough (in my opinion) to warrant a targeted build. More than that, though, the Critical Damage multiplier is too low for it to be worthwhile, so I’d avoid this path unless you have a Riven for CC and CD.
On the other hand, the Dex Dakra has a good base Status Chance (at 20%), so I’d recommend building towards this. You aren’t likely to hit 100%, but it will still get high enough to apply Status most of the time, if not always. It’s always great to leave your enemies bleeding.
As a result, I’d probably suggest the two weapons are somewhat on par in terms of viability, but neither is top tier.