slaver: lvl1: [3 CH, 60% barter] can enslave weak humans and ghouls (like now) lvl2: [6 CH, 110% barter] can enslave normal humans (raiders, robers, caraban guards,etc) lvl3: [9 CH, 160% barter] can enslave super mutants(need a brainwasher), and strong humans (rangers, patrols, etc. no bigguners)notes:-brainwasher (graphic =psychic nullifier) will be harder to obtain, maybe trough a quest with high cooldown.
I think the biggest problem is that this class would limit your ability as a slaver. If you're devoting all those points to speech and barter, it's hard to develop a combat skill to enslave them. Speech atm is fairly useless, it seems like most things are based on CH instead. And barter seems to only have an effect on the trading timer. If your barter/speech actually affected the selling price of your slaves, then this would be more reasonable, but you'd still have trouble capturing anything if you had 50% SG and 50% unarmed to take down your enemies.