Well, you have 4 gold spots. Avallach + Renew + Shillard + 1 card. I calculated the total with Vilgefortz - you can exchange it with Cahir. In both cases it is 1 card, so adding Cahir and removing Vilgefortz does not change anything. So you get 6 cards from golds + Albrich + Stregobor + Decoy + Sweers. Honestly that is 10 cards max - if you get Sweered for more than 1 card, it is more your fault than anything else. So that leads to 23 cards... Not 26 as you stated.
Plus 1 for Emhyr himself into replaying Stregobor, Albrich or Sweers is 24 at least. which is already a problem. Means the crones will get bricked even if you summon nothing else from your deck. And that's without ever counting Sweers as 2 (which is very likely against Spies and Dwarves and things that summon units from the deck like foglets. Not necessarily one's fault) or counting any Albrich/Sweers created from Dazhbog Runestone.
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