Well, the great cleave situation is just very unlikely. If you want, you could simply take an halfling wild sorcerer with chaos bolt. He use it twice (using AP) and always hit and roll even (so the effect bounce) up to the last enemy, always doing max damage. Let's say his max damage is 1d10+(5)cha+(4)dex+Weapon Focus(Dagger) is 20, there is 9 enemies on the field (as your example show there is at least 9 of them).
20 (max damage) * 9 (enemies) * 2 (use of chaos bolt) = 360.
Then, you move and provoke an AoO from someoen and use a daily: grounding Rebuke, which can do another 1d10+10, so grand total: 380. Also, the halfling only had to take 1 AoO, so he is more likely to survive.
I just beat you... with some if, you can travel to the moon, you know.
EDIT: OK, quick review. With 25 buy points, you can have a 20 cha and an 18 dex as stats for an halfling at level 1. You can add a Weapon Focus bonus to each attack. You can also use a daily which is an immediat reaction...