I am not answering your question, but there are little things you could improve a bit:
* Previous First Player decides ties about who will be the next player, not the new Turn Order, so the clarification should go 1 line up.
* There is no thing names Bonus Battle. Any action that does not count for your turn action is an Unlimited action, so you can start any number of Unlimited Battles when you have 6 SpellBooks.
* In the Action Phase you could add that you can perform any action listed as "Action:" you can have.
A little bit more:
Gather power phase
Sacrifice captive cultists (1 per cultist)
O think all library specual rules apply on the action phase. Maybe gain silence tokens is in the doom phase