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A general challenge for you here.
Going by the attached lineage if Duke E2, heir to A, predeceases KingA3 how would A3 determine the succession of his titles (King A, Duke E, Count G)?
And how would the relative value and powers of A to G, their wives, and the Archbishops, vary it?
Current Succession Precedence
daughters can inherit counties
daughters can inherit duchies pending royal assent
daughters cannot inherit the kingdom but can transmit it to their sons pending royal assent or assent by the Council of Dukes
mothers can be regents for their comital/ducal/royal sons