I don't think you need mind control but the psi attacks get ridiculous later. However, in my experience, your armor is nearly immune to anything that's not a sonic cannon so while having 1/2 your squad permanently panicked/MCed, its actually hard for MCed XCOM agents to kill other XCOM agents(unless you equip everyone with sonic pulsers).
In Soviet Russia, Civilization Micros You!
"Right, as the world goes, is only in question between equals in power, while the strong do what they can and the weak suffer what they must."
“I have never understood why it is "greed" to want to keep the money you have earned but not greed to want to take somebody else's money.”
"Right, as the world goes, is only in question between equals in power, while the strong do what they can and the weak suffer what they must."
“I have never understood why it is "greed" to want to keep the money you have earned but not greed to want to take somebody else's money.”

