The first hit of any weapon skill gains the accuracy bonus. I'm pretty sure that's what ended up as the consensus.

The stack on loads of mods came from not 'needing' accuracy. And the most popular one hit weapon skills come with an inherent attack->defense bonus. So all that's left for them is to load mods. Blade: Hi does not gain such an attack bonus as far as I can tell.

The biggest bonus is the crit hit on the main hit. And as Mojo stated with the gear choices. It's not a bad idea to gear toward that.