I play Rakan, im castel rank 32. I just had my first troops level XI. First, you have to know Rakan is the hardest army to take on hand. Still searching thé best combo.
I can give you some advice :
Army for fight :
There is à lot combinaison possible.
Gold i made 2x24 gold crossbowmen and 2x24 gold samouraï. Sometime i made à gold dragon but useless for fight except in void.
Monk are very good to kill big unit and stop charge of horses. Gold ninja sucks.
Silver i made à lot of Samouraï bc they cant lose moral. Crossbowmen are usefull always. Best Rakan unit. I made lot of silver dragon. In battlefield put 2 in thé front corner to secure thé middle.
Like human make à lot catapult they are same.
Never place crossbowmen in front they die fast. I put always Samouraï. In that way enemies have always to kill all 1st line one by one.
For wall : you have the best silver troops. Silver samouraï, never lose moral. All unit are usefull for wall. Remenber to put some dragon to buff them at started.
Big unit. For duke big unit suck. But for prince thé best. Bc you can summoned 3 Rakan troops until thé end of battle.
Enjoy Rakan !