During preparation day of war, the participants with higher level troops, usually 1, 2 and 3 shall fill the remaining Clan castles. If they didn't fill and there is not much time left till war Battle Day begins, all others fill the clan castles.
Troops to be filled in clan castles:
Clan Castle Level 1 - 1 Valkryie + 1 Minion.
Clan Castle Level 2 - 1 Valkryie + 1 Wizard + 1 Minion + 1 Archer.
Clan Castle Level 3 - 1 Dragon.
Clan Castle Level 4 - 1 Dragon + 1 Wizard + 1 Archer.
Clan Castle Level 5 - 1 Lava Hound.
In case the troops can not be fullfilled, especially with Dragons or Lava hound, fill with next best possible troops. For example Dragon can be replaced with Wizards, Valkryie with Wizards, Minions with Archers etc.
For lower level armies, Valkryie is a very good defender, but can be killed by any air troop, for example single minion. That's why we add 1 minion to the castle.
For higher level armies, Dragon protects very well, especially against giants and hog riders.
Lava Hound in higher Clan Caslte defends pretty good, especially after it splits.
If you have any other configuration, or suggestions for the clan castle troops, please feel free to post a reply. This post will stay as sticky and will get frequently updated.
