[Soapy]

Mages that don't build WIL (and yes, there are a lot of them, like half of my characters) generally get to build tank stats instead.

Would you find 40 points in WIL for +80 Invoke LV or 40 points in DEF for 40% Physical DR to be more effective?

Nuke mages are pretty much always Evokers that get access to HSDW anyway, which is why I didn't suggest them getting a bonus.