The cool thing with the Illuminator is that you can look at the top card of your library in response to its etb, so you can get immediate value that turn
Yeah, because illuminator static ability is a state based action I believe. It doesn't need to trigger like the ETB effect. That added information certainly makes the decision better.
New to the game... So if you board wipe with Millicent on the battlefield and you have 3 other non-token spirits on the field, you get to make 4 spirit tokens? Is that correct?
Actually, yes! Works just like Blood Artist. When multiple creatures die at the same time, they all 'see' each other. You can see the Blood Artist ruling here gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=545739