A pit - Mastiff cross should be an extremely dangerous animal if angered. Mastiffs are much much larger than standard pits and Mastiffs have about twice the biting power. Combine all that with the “pit bull attitude” and this dog should be extremely formidible.
It’s amazing that pit bulls top the charts on murders because they are not as large as rottweilers or dobermans. So that’s alot of aggression packed into a medium large athletic dog with particular fighting advantages! Then cross one of those ‘tudes with a mastiff! Can’t begin to imagine what it would be like to ‘face’ even one pit-mastiff crossbreed let alone a few of them. The guy in the article said ‘they had her off the ground and were trying to rend her apart’. That’s the stuff of nightmares.