I am in serious doubt, which "special" zombies should I use? They are not all maxed yet, but I can max them soon enough, so just give your suggestion on all zombies maxed.
I always get the 4 special support Zombies that have the Attack Speed, +Attack, Bomb Atk, and I think its Raise Corpse skill. The Atk Speed, and +Attack are a must for the highest levels.