[EVERYTHING] So you wake up in Jon Snow's body, how do you deal with the WW invasion?

First things first, knowing how the NK reinforces his numbers you'd need to find a way to group up the population. So if your army pushes them back the NK can't just leave, re arm off a few un/ lightly protected cities. I'd send word for anyone capable to retreat to these locations; 1. Dorne. Anybody from lands south of King's landing ie the Stormlands and the reach should bring their people to Dorne. The mountain pass acts similarly to the Neck in the north in that it's easily defendable. 2. Harrenhall. For the rest of Westeros, that doesn't have the natural protection of Puke/ the Vale, running all the way to Dorne would be a long trip in the summer. Harrenhall is a massive castle conveniently located in the dead center of Westeros. Men from all over could flock to Harrenhall, unlike other more easily defended smaller castles like the Eerie or Storm's end.

At this point you know the final battle will be humanity's final stand. You throw everything at the NK to try and kill the head. A shield wall composed of unsullied and Westerosi knights protect the main gate, baiting the NK's army against the walls of Harrenhall where militia will rain down arrow fire from the battlements. Also use any wildfire you can get your hands on from King's landing (where I'm assuming if I'm Tyrion that Cersei is still making the stuff after you find out she's not on your side), Ballistas to shoot at the NK's dragon and any other tricks like Lava pots you can think up. Viseryon's flames hopefully keep the NK from roasting the castle, especially if it's being controlled by warg Bran.

As this happen you have to launch your Gandalf charge. The Dothraki and riders of the Vale charge from a hidden location on the frozen God's eye, led by a vanguard of Drogon/ Dany, Jon and EVERY knight with a Valyrian steel blade you can get your hand on. This includes all your living major characters; Jon, Jaime (or whoever takes his sword if he dies killing Cersei), Brienne, Beric (your red shirt), Arya and whoever Sam gives Heartsbane to (preferrably Jorah). There's so much plot protection in this squad that there's no way the NK could take em.

Submitted January 27, 2018 at 08:42AM by We_The_Raptors http://ift.tt/2DU5SqN