Novus is simple. You don't even have to grind.

Accept quest
Do expert roulette
Do map
infuse materia

It's just something extra to do each day. If you do all the roulettes each day then every 2 days you can do an extra for 800 myth. Again, no grind. Just doing simple tasks each day.

You CAN grind alexandrite if you want but you aren't forced to. The prize for doing this simple daily task for 75 or less days is an awesome 110 weapon that beats the pants off the solidery 110.