A musing: I wonder if it's gonna be a good idea to create a specific demon just to house all of those Nulls-skills. To use it as a base ingredients to spread out all of the null skills to other demons that may not require all of those Nulls-skills but just specific stuff to complement their weakness.
Speaking of which, anyone here using the Money DLC? Ginza is freaking insane what's with all the required money even just to explore around. How am I supposed to cope with that especially after purchasing all of those terribly expensive elemental bullets and special fusions? Gah.
I bought all cards and even stuff from the secret shop and never bought any DLC. Relics respawn quickly so you can make a mint in no time. Just sell equipment and items you don't use and farm relics. Later on there are two terminals located inside areas with 4-5 stars relics and with 4-5 stars relics spot just outside the areas. In both area on the world map encounters drop A5 demoloin which are worth a lot of Macca.