After much thought an consideration... I vote for Marsuveus to survive the Zombie attack.
*He probably would find a way to turn the zombies to his nefarious plot like Phantom says.
*He got to spend 180 days with the guards, and no one could be around Marshy that long without him finding a way to charm them, so even even if he couldn't find a way to lead them Issym and the other guards would be willing to defend him.
*Teshia would be using all her friends, spies, and less than savory connections to find his whereabouts in her usual quest for revenge, thus getting all of the menki, powerleveling dueller,s Cutthroats and decent spies killed because they would be caught unawares by Marsuveus' zombie forces.
*Mars would probably also have all of everyone in Yliakum's best friends taken by the zombies, leading everyone else to lead suicide missions to try and get them back.
*Tesh has already stabbed Mars in the chest with a perma-death-capable weapon and he still didn't die... so let's face it, Zombie teeth aren't that much of a challenge for him.
*At the very end... there will be just Marsuveus, the zombies and Tesh remaining... and Tesh will throw herself to the zombies as soon as Marsuveus points out there are no menki remaining.
I'm a zombie?!