Responses
Dane is a dominant omega, dominant omegas have an avantage over dominant alphas if it's not 1v5. But Dane is also a very big one (1.96m) and physically strong one, he acts more like an alpha (sometimes more than Grayson lol), and everyone thinks he is a beta.lol
And in Grayson's case another alpha wouldn't do it, since Grayson is more like an ultra dominant one (normaly Grayson holds back, but he is far more dangerous than other dominant alphas), he would always have the upper hand. But Dane could just knock him out with his pheromones, if necessary.

A bit dissapointed because I thought his asshole brother would get an Alpha×Alpha ╥﹏╥ so much more interesting that just repeating the same omega×alpha the two other stories have already