Board Thread:Update Suggestions/@comment-31561904-20161225025643/@comment-25856498-20170226125457

I'll try not to involve too much math here, but say you play the Draught. If the Draught stops Elixir production completely, in the period of time the Draught is active, you'll be gaining Elixir as normal, while the opponent does not. This results in you gaining more Elixir than your opponent in that period of time (though the costs may not be covered in that period of time)

Now let's say instead of stopping Elixir production, it slows Elixir production down. Now the opponent is gaining Elixir, albeit slower. Comparing the opponent's Elixir generation in both cases, one can easily see that if the Draught slows production down, it would be worse than if it were to stop production completely.