I've recently seen your thread but haven't had time to reply until now, gotta say that I like the Barberous inspired robot, nice to see Stock robots that aren't the usual stock competition bots.
-I'd suggest adding a second sawblade and to put them a bit more out to the sides, so it's like : Wheel|Sawblade|Center|Sawblade|Wheel.
-Redbird Motors are technically better than the Angle Motors, however I'd recommend them instead since they take less width(either that or make your robot wider, should help with getting the hits in, since this type of robot needs to get close and having a small width might end up with your wheels blocking the blades).
-As for back wheels, try to put them in the center height, not sure if you actually need them(unless you are building for realistic style).
-I'd highly recommend to put one of the big batteries in your robot, from what I remember the pink ones should only be used as extra batteries or only on small/middleweights since they give out less power(so having blades and drive activated doesn't give them full speed) and have a bad weight/power ratio compared to the others.