Okay. I am surrendering.
What do i do wrong? Because nothing happens, nothing spawns.
1) There's no region defined that contains a valid missionZone for the mission to spawn.
AlienMissions with objective: 3 require a spawnZone that contains only single locations such as cities, eg. [91, 91, -22.366, -22.366]. On the vanilla regions, missionZone 3 is set specifically for this propose.
Thus, your mission is assigned to spawnZone 0 of the vanilla regions, and since those define large areas like [60, 83, -70, -67] and not single locations, will never spawn.
2) But if you assign spawnZone: 3, it will use the vanilla alienDeployment instead of your STR_HUNT.
For the game to use your modded alienDeployment, it needs to be assigned a texture in globe.rul, and then the texture needs to be assigned to a region on regions.rul.