My static pretty much has a standing rule (and it's more of a guideline, as we all are friends and get along) that for content in which we're still progressing, folks are free to get any kind of practice INCLUDING the win outside of the group, even if it reduces our chests once we finally do get the win. Having folks with clear experience is well worth one week's chest shortage. By the same token, on days when we need to replace members that can't be in attendance we do not turn up our noses at veterans who already have the week's clear, even though it costs us a chest. Once again, their experience is worth the price.

For content that we have on farm, members are either expected to save the weekly clear for the group, or we all agree ahead of time to individually get the clear in PUGs before we meet (so as to save time in getting to the content we're progressing on).