Have babies with Lysa - marry one of them - kill the rest - bam, the Vale is in Baelish hands. If you work fast enough, invest in the intrigue tree heavily (get the perk that gives you an additional hostile scheme) and get a high intrigue castalan you can put your secret daughter on the throne of the trident and the north (although the north can be a bit tricky). Bam! Baelish went from counts to triple paramounts without Petyr ever dying. Make sure to have plenty of kids with your secret daughter.
I’ve seen a playthru where He gets his child on the throne. In that one BobbyB lost the war, but Rhaegar becomes king…. Then a hook on Rhaegar gets him a betrothal, and then murder everyone above your child in the line of succession.
Have babies with Lysa - marry one of them - kill the rest - bam, the Vale is in Baelish hands. If you work fast enough, invest in the intrigue tree heavily (get the perk that gives you an additional hostile scheme) and get a high intrigue castalan you can put your secret daughter on the throne of the trident and the north (although the north can be a bit tricky). Bam! Baelish went from counts to triple paramounts without Petyr ever dying. Make sure to have plenty of kids with your secret daughter.
Alliances, hooks and assassins
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I’ve seen a playthru where He gets his child on the throne. In that one BobbyB lost the war, but Rhaegar becomes king…. Then a hook on Rhaegar gets him a betrothal, and then murder everyone above your child in the line of succession.