Full potential is going to be a bit difficult to measure.
That is not to say you can't bring out the full potential of your mech, but person A's full potential may be very different from person B's full potential with the same mech, performing the same function. You have to ensure your comparing apples to apples.
As mentioned previously...
3Xtr3m3, on 21 April 2012 - 06:51 PM, said:
... full Armor, then max the speed(within reason), then, see what you have left for weapons space and tonnage.
A tried and true formula.
Works really well to start with. After that, I would throw in some common sense. If you enjoy and are more comfortable with a specific type of weapon but you are one ton short of putting your favorite weapon in a location with the current amount of armor. By all means drop a little armor and have your favorite gun in place. If your enjoying yourself you will more than likely perform better.