Riven - An ex-soldier and exile probably has a lot of experience with foraging and surviving.

Sona - Speeds everyone up when we're running away and heals. She can also force all the zombies to dance instead of eating us if things go wrong.

Malphite - He's a freaking rock. Rocks don't eat. Rocks don't sleep. Rocks don't care about zombies. Forget ranged weapons, we'll just have Malphite plow through hordes like the unstoppable force he is. He's also the perfect sentry and pack mule.

Darius: He will deal true damage to everything
Tryndamere: Undying Rage Undying Rage Undying Rage Undying Rage Undying Rage Undying Rage Undying Rage
Zyra: Plants dont get killed by zombies, and she doesnt need to eat.

Hecarim: He can just run anything over
Malphite: rock, so he doesn't need food, water, or rest
Karthus: press R

Riven
Kat
Lux
3some ^.^ No other reason

Ezreal - GIANT BANANA OF DEATH (True Shot Barrage)

Darius - Get dunked

Malphite - Rock Solid *Malph ults* GG WP Zombies

Karthus: ult kill all
Riven: ***!
Katarina: ***!
*** = repopulatoin

Caitlyn Graves and Corki. Shoot stuff up.

Karthus
Yorick
Sion

these 3 are already dead so they cant die again, ULTAMITE TEAM!!!

Eve- Stealth forever!!!!!!!!!
Yi-He be dunkin zombies
Singed- He just can't die :3

Sona- Healing, Soothing Music
Zyra- Plants vs Zombies irl
Draaaaaaaaaaaaven- Do u really need a reason?