Molos's poor Charisma is evident, his infernal heritage taints all his dealings. Yet Molos is remarkably brutal and understands how to make others fear him, so long as others fear you they will not strike out against you...
Molos favors direct control over the mind, an enslaved mind is one that cannot rebel nor plot against his after all. Molos is also cunning, he understands that the best way to destroy an enemy is to exploit any attachments, weaknesses and so forth that the man has. Why threaten to kill a man when you can make his own lover desire to kill him?
All in all Molos's evil does not stem from a need to conquer, it stems from a need to control his enviroment...