Fire Emblem Heroes Friend IDs and Tips

[Jranation]

I didn't manage to do the lvl 35 one. I didn't had the team to do it.

Does the Tomes > Bows > Shuriken > Tomes work here?

 

And does anyone have a high level Ninja/maid/butler? Do they seem useful? Like in the arena and in lunatic modes and other maps?