So guy the 10 DOCTOR vs the vex try to give a good reason why. Also the doctor only has the TARDIS.
-
I think you wanted the vex to lose. You could have picked anyone else to go up against them. Any Star trek crew, Star wars character, Space balls guy, Firefly company, Lantern Core...you get the point..... but you pick the Doctor. vex would just be another puzzle to solve.