Livestock guardian breeds do NOT do well with other dogs, as a general rule, particularly not dogs of the same sex. Including, and sometimes especially, siblings! It is important to remember that the functino of a LGD (pyrs and Akbash) are to protect the flock from other predators. Like coyotes, wolves, and dogs. They can do okay with other breeds if they're seen as part of the household/flock, but coming in together, at the same time - I'm far less sure.
Some people can do very well raising siblings together - of some breeds. Frankly, I don't think I'd even ATTEMPT it with LGDs, especially not ones with the size and power your pups must have, and if they're fighting to the point of drawing blood... Gotta be honest. I'd rehome in a hot minute. If you won't/can't, then you need to contact a professional, and keep them separated in the meanwhile (crate and rotate). And if you won't do THAT, especially when you're not supervised? Be prepared to come home to a seriously injured or dead dog or dogs.