here's how i set mine up, using king's #2 kernel...
main profile: 1152 max, 245 min, conservative
other profiles...
battery < 10% - 245 max, 245 min, powersave (priority 100)
screen off - 499 max, 245 min, conservative (priority 99)
battery < 17% - 499 max, 245 min, conservative (priority 95)
battery < 25% - 729 max, 245 min, conservative (priority 89)
battery < 35% - 998 max, 245 min, conservative (priority 79)
battery < 50% - 1113 max, 245 min, conservative (priority 69)
i am impressed with how stable it has been so far, but i've only been overclocking for a few hours. i'll report back later after i've been using it for a while...i'm still at 91% battery after almost 2 hours off the charger, and that includes a ton of different quadrant benchmarks with different settings, just to see how everything worked...
this is my first attempt at overclocking, so if anyone has recommended changes to my setup or additional profiles i should add, i'm all ears...
edit: changed the profiles slightly to move screen off up in the order (to make sure it's actually clocking down even if the battery is below one of the thresholds).