Okay, so if each effect is a separate button, then we can draw three conclusions:
1- The four share a global cooldown
2- Each has its own cooldown
3- No cooldown on shatters
No matter how you slice it, it doesn't sound like interrupts will be OP.
Now that I'm looking at this more closely, I don't understand why I'm even typing. It sounds like Skyy and I were on the same page; he was just more certain to my "maybe" each illusion causes its own effect.
Oh well, +1, amirite, gents?