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For the Tower, I always play as Toros, building 12346 + a Citadel, and placing the watchtower on 112.
The goal for the first two weeks is to get Djinns, upgrade, and build a Castle.
Initially, my army consists of:
a stack of Gremlins
one Grand Djinn
one Grand Djinn
a stack of Nagas
one Grand Djinn
one Grand Djinn
a stack of Mages
+ a Ballista
In Platinum, it's a disadvantage that Toros doesn't start with the Ballista skill; it often doesn't appear :(.
My second army is usually made up of Golems and Gargoyles (for cannon fodder) to support taking valuable resources.