Please be more specific about them sectoids; when does the crash occur? Do you have any saves, pictures, or at least detailed description?; I will look them up anyway.
However it seems that the problem that was crashing the game for Geneoce (and Frogtown, I believe) is here:
- type: superhumanRetaliation
minDifficulty: 4
missionWeights:
0:
STR_ALIEN_HARVEST: 25
STR_ALIEN_RETALIATION: 10
STR_ALIEN_RETALIATION_L: 15
STR_ALIEN_RETALIATION_M: 20
STR_ALIEN_RETALIATION_S: 15
STR_ALIEN_RETALIATION_C: 15
Does anyone know what's wrong with that? All these missions exist, and work fine when spawned by shooting down some shipping (as Meridian has witnessed), btw. Is it possible that STR_ALIEN_HARVEST (which has no objective) collides with Crackdowns (which DO have an objective)?