Decided to keep playing. Finished wiping out the Tyrells while the Islanders conquered Dorne, and I guess they wanted to complete their ownership of Dorne, because they took Kingsgrave before Stannis could get their to relieve it. Not very smart to poke the bear though because Stannis went on a tear through Dorne, absolutely crushing the Islanders.
Stannis then sent some of his nephews to take the actual Summer Islands and their outpost on Lys.
With the Islanders removed I could focus on the north. The Greyjoys tried to take The Twins a few times but to no avail, with Theon even dying in one of the assaults. The Tullys tried to mount an assault and retake Riverrun but they ran off before Davos the Great got there. Again poking the bear is not a good idea as Davos took out the Tullys without much trouble. Due to the forced alliance script, and the Arryn's obsession with trying to take Harrenhal, they were involved in Davos' assault of the city as allies of the Tullys thus becoming official enemies and summarily conquered.
Meanwhile in Essos, Dany was still going on a tear of her own, conquering Volantis and most of the east. She did have some trouble with revolting Dothraki. She finally came to blows with Pentos, while Braavos took advantage of the situation and conquered Pentos themselves and half of the western cities in Essos.
They Greyjoys were pressing The Twins with some serious stacks, but they were beaten back, and the time came to take them out. The great Davos and several other family members quickly took the Greyjoy's mainland territories and came face to face with the Walkers just as they were finishing up the Boltons and Starks, who had held Winterfell all this time. Stannis had set sail from Dorne to take out Pyke and end the Greyjoys, but, just as in the show, the Greyjoys had a pretty serious navy, and our noble leader Stannis was lost at sea. Matthos, Davos' son, had quickly rerouted his ships and landed before being taken out themselves. He would march north to Casterly Rock and set sail from there.
However at the same time the Walkers began stomping over my territories in the north. Davos marched west to the sea and attempted to reach the Walker's homeland and destroy it, thus destroying the Walkers, but the stupid Greyjoys kept attacking his navy, despite his messages asking them to cease. He was only trying to save the world after all. He did finally make it there, but he was too far east, and sadly died(?) in a Walker attack.
Matthos did manage to land at Pyke and assaulted the city, but Greyjoy reinforcements arrived in time to destroy him and his army.
With all my southerly armies decimated, Davos gone, and the Greyjoys not giving an inch of sea, the situation seemed somewhat hopeless. Fortunately I had a couple backup stacks in the north and instead of facing the Walkers head on I took them the same path as Davos and actually reached the far north intact. They snuck in and took out the Walker homeland, despite the stacks there, and thanks to the script the Walkers were destroyed.
I had loads of money by this point and was able to easily conquer or otherwise buy the northern territories from the free peoples. Braavos had taken the Fingers a long while back so they sold them to me for only half a million coins.
In Essos Dany had conquered all but Braavos so we'll see if that half mil will do anything to help the Braavosi cause.