This is why I prefer it to have more DPS in a group than the minimum number they specify in this game when it comes to harder content. Efficiency will always be there, but hey, if someone can make it easier by bringing more bodies in, it opens up the challenge and lets others who may not have the ability to do so get items. At the very least people who do the savage content in the larger group get a book per run.

I would say given how they work right now they should go up to 8 DPS, for a total group size of 12. Any higher than that and DPS checks would be laughable. Even two really mediocre dps are going to out gun a single pro dps.