Roufas, Lyza, Ren, Sophia and Emelia would probably be the main squad I'd use there for manual and auto. Make sure you at least unlock Lightning Slash on Silver. Blue and Myriam can be good for farming with their aoes, looks like you got the good Myriam so congrats there. Unlock Albert's aoe instant ko attack and wait for the new Albert (on the Minstrel banner) to get added to the plat pool and pray you get him. Gray is a solid slasher, feel free to invest in him too and White Rose is another good addition to your mage team. Parry tanks can be pretty OP for new players when used with a formation like Rising Phoenix so you might want to consider doing what I did and saving up eggshells to buy tank Albert from the hydra's exchange (250 pieces from the shop to buy him outright).
Congrats on your solid start, things are really gonna pop off over the next month and a half so save up and good luck!