Which one should be maindecked in U/W Fish Kataki or Cannonist? I feel the Cannonist makes you have more control of the game but tougher decisions to make when playing. Kataki makes you pay one for your null rod every turn but if you play kataki there going to sac there moxes anyway since u have null rod out. So which one is truly better?
The answer is dependant on your metagame.
Canonist is the clear choice unless your meta is infested with workshops.