No offense, but ZAPT is going a bit overboard. Blockland is a Sandbox game; a game where you can just do whatever the hell you want. ZAPT is too restricted; you can't spawn zombies out of a minigame, you cant spawn them on a normal vehicle spawn, you have to have an actually structured build to use it properly, you cannot make custom AI's for it, you cant use Left4Block with it, thus breaking so very many addons...
Gamemode_Zombie is simple and unrestricted. If I want to spawn 80 witches and shoot them all at once, I can. I cant control how ZAPT functions like I can with Left4Block.
You should use the same spawns for all the zombies, allow them to be spawned outside of minigames, and make it so that both Left4Block and ZAPT can function at once. Or it's simply not worth it.