Question about Miracle Time.

Of those three personally I'd try and get the Carte Finale to legendary so you can cube it for boss damage. Maybe throw 2-3 cubes on the goggles too if you have any left over. Generally unless you have a huge amount of money (or get incredibly lucky) it isn't worth getting anything other than weapons to legendary.

I've never noticed items gaining better stats during a miracle time though, I think the only change is the rate of a potential tier upgrade.

Tell that to my belt that got to legendary by accident. My rings are an incredible investment and the Spectrum should be good enough if I just get it to 15% LUK minimum, so I'll cube that card and see how it goes as I've heard a certain popular dungeon may be out in MSEA by this year!