4- 220V -> 9V converter (300 mA)
This won't power even one motor or servo.
Budget 1 Ampere per servo. Post a link to the motors, or post the stall current from the data sheet. In addition to 1 A/servo, the power supply must also be able to supply the motor stall current, typically 5-10X the running current.
5V -> arduino 5V (I know this is weird and should probably ruin the pin, I tried attaching it to Vin but it just didn't work! I'd appreciate if anyone knew a reason to this)
If a motor or servo is also connected, it can ruin the Arduino, not just the pin. Don't do this; use a separate power supply for motors and the Arduino.
The Vin or RAW input voltage must be 7V or greater.