Alright I choose Toads for a few facts. Alright first off clones would serve purpose of scavenging with you, yet they cannot help you much in fights, you will have difficulty using this technique. As for Byakugan, it is nice, you can avoid the zombies so thats cool. As for fire jutsu, its a small fire jutsu you chose up there, it wont cover a wide area, leaving you open. Secondly you cannot possess all zombies it is impossible, lets say like a hundred zombies coming your way, how you gonna use it to defend from all of them. Now as for Toads its a risky choice, since if you summon them to fight, if they get bitten they will also turn into zombie toads, but if they are succesful in summon, they can devastate the area. But thats not the fact why i choose them, it is because then I can reverse summon myself back to Mount Myoboku where I can live in peace with the Toads, and eat worms and shiz like them -_-