Spells are important if you do trophy push. For farming, they're not critically necessary, unless you plan on farming dark elixir at crystal 2 and up. Upgrading them is a good idea, but don't neglect your main farming troops.
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Spells are important if you do trophy push. For farming, they're not critically necessary, unless you plan on farming dark elixir at crystal 2 and up. Upgrading them is a good idea, but don't neglect your main farming troops.