Well, here's how it would be: The numbered classes (1-5...six would no longer be necessary) would classify the actual abilities. The descriptive classes that I have listed would describe the Variant themself. These are used as a codeword to get a quick read on a Variant's capabilities with as few words as possible. So, let's say, my girl Sierra would be a Red Level Volatile with Class 1 and Class 4 abilities, for example.