I would keep the fight between whites and humans at the last where I would have given it a 2 episode where Cersie dies in the hands of whites after she betrays Team Danny .Team Danny would have lost the fight against whites in Winterfell then they would have marched towards Kingslandings but Cersie betrays them and her Army and Rest of left over army of Team Danny would have faced off but before their fight began Winter would have fallen upon them and along with them the army of the dead,the dead army would have entered Kingslandings and started to infest others due to which Danny dragons would have started burning Kingslandings and after that what follows would have been exactly same with the Knight walker death scene .Danny would have been severely injured due to which when would die and Jonsnow would have sat on the Iron throne.

I would keep the fight between whites and humans at the last where I would have given it a 2 episode where Cersie dies in the hands of whites after she betrays Team Danny .Team Danny would have lost the fight against whites in Winterfell then they would have marched towards Kingslandings but Cersie betrays them and her Army and Rest of left over army of Team Danny would have faced off but before their fight began Winter would have fallen upon them and along with them the army of the dead,the dead army would have entered Kingslandings and started to infest others due to which Danny dragons would have started burning Kingslandings and after that what follows would have been exactly same with the Knight walker death scene .Danny would have been severely injured due to which when would die and Jonsnow would have sat on the Iron throne.

I would wait GRRM to complete his 3 books and moke at least 3 more seasons.