I don't really see Trebor, Drallig and Tano lasting long against Bane even as a group. Bane might reduce them to ash with his powers, IMO. The real threat is from Marka Ragnos, a powerful Sith Lord and master of the Force.
Debatable aspect is that if the fodder 3 (Trebor, Drallig and Tano) can buy Marka Ragnos sufficient time to take advantage and subdue Bane. Maybe.