Using a Arduino Pro Mini to power more than 2 servos
That's not correct. There was a limit in early versions of the Servo library, but that's been removed. The Pro Mini uses the same ATMega 328p chip as a full-size arduino, so the only limitation is the number of PWM pins that are broken out. There are 6 on a Pro Mini, and the library supports up to 12 on a non-mega. 

Also - note that the arduino micro is based on the ATmega32u4 chip, which means it'll behave like a Leonardo, not a standard Uno. It has 7 PWM pins.