I'm currently using the Silverfish API with a priest deck, and I'm getting a very good win-rate, so that isn't the problem. The only thing I dislike about the bot is how slow it is. It doesn't hover over anything, and has long awkward pauses (when targeting a creature with a spell for example). Is there a setting where the speed between plays can be increased? Otherwise, here's a suggestion to the developers: make it so that there's a long pause at the beginning of each turn (as a human would think about his moves), and then speed it up, because the human would've decided what to play without long pauses anymore.