Optimal pairings and builds for my kids?

[Fire Emblem is cool]

I have completed my Revelations pairings and would now like to know which of my kids should be paired with one another or if some should just be completely left out to be a solo galeforce assassins. Your suggestions should have a reason behind the pairings along with the build the pairings should be (i.e: A nohrian trust build, dodge build, galeforce taker build, go wild with your imagination because there are probably plenty other builds out there). Also would appreciate if you went into depth and gave me the whole skillset rather than just name a build as i'm not that experienced in this in the first place. Without further ado, here is the list of kids I need help pairing and optimizing: (I'll also be leaving the class/es that i'll be making each of my kids but feel free to suggest a different class if you feel necessary) 

1. Elise!Ophelia - Witch
2. Orochi!Rhajat - Witch
3. Oboro!Sophie - Paladin or Hero
4. Rinkah!Caeldori - General, Great knight or Falcon Knight (Has S rank with Ignatius)
5. Setsuna!Dywer - Master ninja (Has A+ rank with Asugi)
6. Nina!Kana - Witch
7. Kaze!Shigure - Swordsmaster or Master Ninja (If I want him as a Swordsmaster I need to make him A+ with Hisame)
8. Selena!Hisame - Master of Arms, Hero or Blacksmith
9. Felicia!Forrest - Strategist or Sorc
10. Charlotte!Siegbert - Berserker, Hero or Paladin
11. Hinoka!Mitama - Dread Fighter
12. Camilla!Velouria - Wolfssenger
13. Nyx!Nina - Adventurer or Onmyoji
14. Mozu!Kiragi - Sniper or Kinshi knight
15. Effie!Percy - Hero, Wyvern Lord or Berserker
16. Beruka!Ignatius - General
17. Azura!Midori - Master Ninja
18. Kagero!Shiro - Spear Master
19. Peri!Soleil - Paladin or Hero
20. Hana!Selkie - Nine-Tails
21. Sakura!Asugi - Dark Falcon