[Lolzytripd]

With Luminary Element, All Element/Rainbow Caster just became a bit more possible.
(I'm probably going to get someone replying to me telling me that the idea is insane, but its really a thing that comes more form fluff ideas than crunch benefits)

not really since luminary removes the .5 elemental attack per will to each element.

If you're trying to cast everything you're better off going for one of those builds that hits 45-50+ all stats in combat so that you have base around 65-75 elemental attack in everything.