Since all phones are different, you just have to experiment to find the right kernel for your phone. I run Chevy's ulv 1.25GHz kernel and have it clocked to between 1000/250 - 800/250 (awake); 400/250 (screen off and charging); and 250/250 (above 114°). I also have my sampling rate set at -1, WiFi, Bluetooth, and all locations turned off. My phone is EXTREMELY smooth, responsive, and FAST! My temp never even hits 100°. On a light usage day, I get about 20 hours one a charge. On more moderate to heavy days, I usually get around 12-16 hours...give or take.
Btw, anything that is an "auto kill" (assuming its for task management), should be uninstalled. The OS manages tasks on its own and task killers with auto kill turned on will only hurt your battery life. I DO use Advanced Task Killer for Froyo but only the widget..auto kill is disabled.