Best way of handling tons of variables?

I intend to have a lot of classes and units in my game with base stats and other variables. I then want the player to be able to get one of the classes, and as it gains exp and levels up, its stats changes.

Hence it will use a lot of variables to keep track of base stats, and each instance.

Whats the easiest way to keep track of this easily with C2 while working?

A ton of arrays? Binding variables to sprites? From a veterans point of view, how do you go at it?

Check out Data storage objects in a container at the bottom of this page: Containers