5) Events that encourage pushing claims to the Iron Throne to happen more often and with the megawars system, making heirs of overthrown dynasties much more dangerous to a new dynasty king especially if they are not popular, make killing infant heirs of old dynasty when usurping the throne a common practice in these circumstances, and even adding events swapping/faking the death of child heirs only to spring them back at adulthood as contenders to the throne. Essentially meaning for e.g. the Targaryans may be wiped out but one of those children although apparently dead may be resurrected later and it turned out someone snuck them away, have an event chain that determines which Lord Paramounts support that claim and launch a mega war to install the rightful king back on the throne. this will also help keep major houses in the game for longer without relying on the game mechanics and AI to keep them going. In my experience once a house has lost a major title they never get it back via the game mechanics alone. you could even fake Essos in the meantime by having a huge army of Dothraki or Unsullied spawn at Dragon Stone or somewhere on the eastern shore with an exiled pretender in command, and as soon as they completely capture their first territory award them the title during the war to give them a base of operation.
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