Clash of Clans Banking Elixir

Turn your Clash of Clans Barracks into a bank. You can queue a large number of troops to train, even when you aren’t online. When you queue troops in this way the elixir you need to train them is “spent” and safe from any attacks. When things are safe and you are back online you can cancel the troops you queued and get your elixir back without penalty.
Wall Breakers have the highest cost per slot. This makes it a great choice for banking elixir. As you increase the level of your Barracks and Wall Breakers you can protect several hundred thousand Elixir this way!