you actually have better raritys than me lol. I only have 1 5* and 6 4* now. after 2 10+1 rolls.
what you probably need is to level your core team up more. to 50evo30 with 100% affection. which you will get there eventually. then you'll be good. and like tenhou said, farming 2-1 is good.
also, dailies is not actually efficient for manyu. because no exp. when early on, the exp gives you levels = more stamina = more runs = more manyu.

regarding what moople said about team setup:
my farming team: (for reference)

->Open Spoiler<-

vs my high power team:

->Open Spoiler<-

Good grief! How did that not kill off your teams when going for 3*? I couldn't get the full 3* past area 5 until I balanced out my teams a little, I kept having at least 3 of the groups die off before getting anywhere near the boss. I mean, I got the stage down, but I never could manage to get every pest.

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.

No point in doing the character quests before you have evolved the girls and gotten a better team. The final one requires the girl to be evolved and is the only one that gives anything worthwhile.

Got one more question before I set off to farm the 2-1 map: When doing farming in the daily missions, is it better to do the 50 stam map or the 80 stam map?

I've got a question too. Why are people advocating 2-1 over 1-3? Comparing them, 2-1 is only marginally better in terms of Gold/EXP efficiency which doesn't seem worth the extra 3 stamina it takes. I haven't noticed a higher Gift rate or SG spawn rate on 2-1 either back when I was doing it.

Aside from that though, I second the suggestion to try spamming the Beginner Secret Garden over the Manyu Dailies. They're not actually very efficient unless you get really lucky, especially not at lower levels.

Here's a trick you might not have noticed. Your helper squad from your friend lacks power right? This is because the helper squad's max lvl is capped at YOUR highest level character (not sure if this cap applies post evolution though, since I leveled my evo-ed girls to a decent level already).

So focus on one girl and get her to at least mid 40s first.