I have issue with this.
Let's say I have found an really nice hide, which I have couple of good shots to try. Then my opponent uses some really hard darkside girder (lets say I have to be komo on steroids to hit the shot constantly enough) and therefore I'm forced to move from my hide to get a better shot for example.
In my opinion, you need to able to nade it, because depending on the map/hides you can't rely ruling on a zook hit. There can be just too many examples of way too hard shots to destroy darkside girders, even with zooks.
In a nutshell, why not just take girders out of the scheme totally?