-Storage hints- You can maximize your storage capacity by storing items at: 1) the Storage, 2) the Workshop, 3) the Trade Bar, 4) the Temp Pocket (by selling to Market then cancelling the sell). In addition, if you are VIP and your VIP is about to expire, you can store up to three items partially in the bottom part of the Storage: you will be able to pick them anytime if there is at least one square visible. You could also use a mule account, but that's evil. :o
My tactic for last level (epic) : cassandra+viegraf+kara (for damage), goblin+mad bull+dwarf+elf+forest+phantom (for small creatures). Just spam your small creatures and heroes all the time, and protect them with max Shield only.
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