1. Pod
2. Tormund
3. Brienne
4. Edd
5. Grey Worm
6. Jorah
7. Lady Mormont
8. Davos
9. Gilly & Sam
10. Royce
11. Theon
12. Ghost
dubs edit: 4, no order
My basic theory is that the battle will kill everyone who no longer serves a plot purpose. The fighters on the main battlefield die first. Starts with Pod to let the audience know that being good/innocent people don't get you plot armour.
I hope I'm wrong about 2 and 3 but I don't see what they would "do" if they survived. Them dying together would be cute, and frankly we aren't ever going to get that ship.
Then we get Jorah with a heroic death to redeem himself to his niece (?) But she keeps fighting and dies anyway.
Then we get the Crypt shenanigans (lets hide from the undead in the place with lots of well-preserved dead bodies, what could possibly go wrong?) and lose Davos, Gilly and Sam (sorry wildlings, that's it for you in this story!)
Royce dies to ensure that Sansa gets the Knights of the Vale under her personal command (Sweetrobin who?). The only way people are escaping the tireless dead is on a horse or a dragon so...
Then Theon dies defending Bran and Ghost dies saving John while he secures Bran on his dragon and they fly off into the sunset.
I hope I'm completely wrong. I'd like to see something completely unexpected, like Dany, Tyrion or Bran getting killed - but I think they've got plot armour until episode 5 at least.