Tiger's the weak link here.
He outright admitted he can't take Shiva, and Cass has several victories over her (Yes, I'm counting the sucker punch. What people fail to mention is she KO'd Shiva with a dislocated shoulder, which Shiva gave her and insisted she use to hand over her keys. Shiva underestimated her, and lost.)
Richard, Shiva, and Cass are about peers with each other, while BT is a notch or two below. He loses to either Shiva or Cass, and then it's Dragon vs a team.