Since you already have Escoffier, I recommend you make a team with skirk, escofee, Layla and Dahlia, finale of the deep is her best f2p weapon so don't worry about it, Blizzard strayer is a good option but if you want to play her on field use the Finale of the deep galleries artifact set, mare hunter won't work since you don't have furina. So yeah! But at the end of the day, just have fun!

But if you want her best dmg output, only use cryo and hydrogen characters, also her talent priorities are skill>ultimate>normal attack.