Stage Map ~ Tortoise Shell

Note: This stage needs no training of troops as it will be provided as shown. And I only succeeded at 2nd attempt.

Troops provided:
15 samurais
15 Mongols
15 ninjas

Method:
1. Release 5 Mongols on the left, center n right to target the tower guns from the far end.
2. Release 5 samurais on the left, center n right at midway. The Mongols with their running from the far end n the samurais should coincide at this point.
3. As soon as the tower guns are destroyed, release the 15 ninjas all at the center to target the jade coins.
4. Now sit back n watch.

Results: 100% destruction with castle fully destroyed.