Thanks for the advice everyone! So aim for 2-1 for now until everyone is at lv. 30+. Got it. Yeah, I should've had higher level units since I did get a week head start living in Canada and all, but exams kinda took some time off. Btw, forgot to tell you guys that I'm lv. 27 right now. Planning on attempting Orchid's second quest mission once I reach lv. 30.
@MoopleFoople - Not sure if you were referring to me or sora on your second post, but if it was for me, then I guess RNG and a good helper carried me past the 7th stage lolz. That and I probably had some good ATK/DEF equipment for my teams.