Hey, some people combine brains and power effectively. Pram the Oracle came immediately to mind. He certainly couldn't say she wasn't effective, and if she was ever going to throw down with him, it'd be a sneaky clever plan designed to catch him off-guard or something.

"Even the weakest Overlord can ruin his entire Netherworld if he screws up. When you get to my level, entire universes can be casualties. A lot of people just want power, for power's sake, you know? But past a certain point it means nothing. If I smash a planet, it's not any MORE smashed than if Dragon Overlord Babylon does, or Dark Lord Valvoga, or King Drake the Third. At that level, you make your own rules. So breaking those rules is admitting you were too weak to follow the rules you yourself set. Which is pathetic!"