Well, I know absolutely nothing about the figment lens options, but I can tell you this much:
-the goggle will or will not fog depending on the venting of hte goggle and lens combined, the only way to really alter the way a lens does or does not fog is to get a different set of goggles.
-Mirrored lenses (like where you can see your eyes) are one trick ponies and wont help much at night.
-Some reflective can cut glare at night, such as the lens 'clear with mirror' or whatever for soldiers, but the lens tint cant be too dark.
-If you wear a yellow lens on a bluebird day you will be squinting all the time and wont like the result.
-Its really best to get two lenses, one for day and one for night. Some tints can do both ok, but no lens can do both very well.