Your perception of luck or what it means is conceptually flawed. There is no such thing as shared luck in the context of bitcoin mining, let alone that you can scale that luck.

My understanding of pool luck is that it is a simple percentage calculation based on hashing power (EDIT: that of a pool over the entire network END EDIT:) as a factor of blocks released by the bitcoin algorithm. Sometimes, weights are factored into that calcullation based on bands of hashing power (of a pool), but in my opinion, this is simply eye candy (aka smoothing). If that is what you refer to as "scalable luck" then you are confusing one thing for the other.