Energy weapons (the Mesmetron), so high Perception, plus tag the EW skill. And Endurance would be important, just in case a guy you fail to enslave blasts you. I'd recommend a good Sneak, so you can slip into raider strongholds (or cities, towns, whatever) and enslave a target, then slip away without turning the rest of the place hostile.
On the other hand, Barter would be of limited import, since the bulk of your money would come in 250-cap chunks. Strength, ditto, since you wouldn't have to carry large quantities of stuff, just what you take form each slave (and sell).
I'd probably go:
S: 4 (increased to 5, since the bobblehead is right in Megaton. You can also get Ant Might, ere you sell Bryan)
P: 7
E: 7
C: 4 (so you can get Child at Heart perk, allowing you to get into Lamplight without having to free the kids)
I: 7
A: 6
L: 5
Tag skills: Energy, Sneak, and whatever else floats your boat.