Chain challenge

for ch 9-10

Miscavel runs Azura Lucina Nino and Linde (for 11-12 too), Jakez123 runs Olivia Julia Rein Lucina

Well, mine's highly inherited, but since you said any suggestions, here you go. For 11-12 Lunatic.

Firstly I used 2 dancers, doesn't matter which ones or even what levels, so long as they have Hone Attack and Dance/Sing they'll suffice. But obviously having higher level/inherited Dancers/Singers will make life easier.

Second, you'll want a +Atk Reinhardt fully inherited with his Death Blow set. Any breaker will do for his B-Slot, but I personally made use of R/B Tomebreaker and Lancebreaker (Lancebreaker being the MVP for me). For C-Slot, I found Spur Attack 3 to be the most useful.

Lastly, you'll want a +Atk Cherche fully inherited with her Brave Axe+ set. She can run either Hit and Run or Axebreaker for her B-Slot depending on whether you need the extra green coverage or not. For her C-Slot, again Spur Attack is the most useful here.

There aren't too many tips as far as the maps go, but some important things you should keep in mind is that on the fifth map, you HAVE to kill Celica turn one with Reinhardt or run the risk of running out of turns.
On the last map, it's easier to move all your units to the right side at the beginning to deal with the units on that side first or you'll get swarmed pretty hard.

Now, if this strat won't work for you, my advice is to just look up guides/videos of how others have done it and try the one that can apply to you the best and work from there.

Hope I've been of help.