That's what I would do. But I think the order would change depending on your favorite attributes and situations where you want to strengthen them in accordance with the old battlefield.
If you don't have a Utusemi. Summon Artemis . Other mind formation (sorry if my english is wrong) Nehan 1 ability I think you can do the same move with Change characters as you like. Sorry I don't know what fmc means. Main weapon, falsehood.
Thanks again for watching my videos! Heist is right about the Ultima Weapon. If there is no seraphic weapon in it, it is a favorable damage increase! I'll try to explain if you have it in something else (unless I forgot).